Malicious PDF — malware analysis report

Static analysis result for SHA-256 eece3c6ad4dcf5d9…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 19:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0df16de7f8024cfd007a32911c79ac97 SHA-1: 69c8c75667727b92a2e3e391c99cc80d173b07f3 SHA-256: eece3c6ad4dcf5d97f2f3d309dd43a33bf332e74e642ef90fa3e0542978725cd
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text related to a 'converting metric units worksheet grade 4', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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=converting+metric+units+worksheet+grade+4 In PDF document text
    • http://zusam.wheelchairaccessdesign.com/uploads/1/3/2/7/132710603/5088958.pdfIn PDF document text
    • http://vimit.drhollysavoy.com/uploads/1/3/0/9/130969205/jenig_deduligovaxini_vawilaved_mupato.pdfIn PDF document text
    • http://xulaw.morschmachine.com/uploads/1/3/1/1/131164112/100912.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/1/0447/9424/9377/files/cisco_ccdp_arch_simplified.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/alta_fidelidade_livro_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/96749566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/lujuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3672/9766/files/modusof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/rerugalijipidudojalito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/35420795986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/asciidoctor_font_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/29557071557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/jofuvelutefosukuzumere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/action_bar_hide_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/xubuvapumamiwapozaviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/vusapovavubunilotirir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/letito.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 2

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_off0000705c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 5528 bytes
SHA-256: cf600d4435b3a358133979fdd6a132127f39299523ab4198e448538cd50d23d5
font_01_sfnt_off00008321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8321 10064 bytes
SHA-256: 939e898875b6d5b566e6e68eeac6b45eb8d990e7d8b45e789b5383358eddeaec

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