Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3316ba72d56bc08…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 08:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21f5839207d2c884f827f570cac079d9 SHA-1: c4fe2e2c71d88158fe1aebab3b52d05c6c7ba66c SHA-256: a3316ba72d56bc08ceee9042af810ef9eeeeeca895b9b406dc5a3e48ff27fcdd
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links to external resources, masquerading as legitimate documents. One of the primary links, 'https://ttraff.ru/pify?keyword=causative+have+and+get+exercises+pdf+with+answers', is identified as a malicious redirector. The document's content and structure strongly suggest a lure for credential harvesting, specifically targeting MFA or one-time codes, as indicated by the 'SE_MFA_LURE' heuristic. The presence of a large number of PDF links also points to a link farm strategy, likely to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=causative+have+and+get+exercises+pdf+with+answers In PDF document text
    • http://files.eugeniojedimartinez.com/uploads/1/3/0/8/130873738/gidalofaz.pdfIn PDF document text
    • http://zokete.vi-vi.org/uploads/1/3/0/8/130814328/a95f82b5291.pdfIn PDF document text
    • http://dosatum.janetmariesola.com/uploads/1/3/1/1/131164243/rabeja.pdfIn PDF document text
    • http://files.combatveteranswithptsd.org/uploads/1/3/1/6/131606431/panixoj-gajiponutojemo.pdfIn PDF document text
    • http://rusitun.shaeleebakkerprofessionalpresentation.com/uploads/1/3/0/7/130775413/gewevedebudowop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/text_2_speech.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/rejeveporokebesefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/xabib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/stevens_320_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/87575984005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/85249617670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/39083778294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/ali_baba_and_the_forty_thieves_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/87748514175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/wulevijumiwawusabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/bls_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/59367271517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/mifazarisawotarenezawev.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 5508 bytes
SHA-256: 8327693e83eef6550364b9a22ff40fa00a527ed24e719a233c1a3d6a9ef6831f
font_01_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 10148 bytes
SHA-256: 01d9b44ca7262c09afe851824c6e7cb249870b05e654a5066e9b626ddc4a2668

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