Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7167dbb98f84a7…

MALICIOUS

PDF

35.6 KB Created: 2020-08-10 07:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97929fa637fa06fbe8c6bc65827398d6 SHA-1: aff087d64e4ab0393bb0675d0452b0e2bbc503e0 SHA-256: 7d7167dbb98f84a766452ca854f6e2f5e2b2d0ba25bf63055f868c8d02b18efe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains text suggesting it is an exercise PDF, likely a lure to encourage clicks. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to an attempt to lead the user to a malicious site.

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=making+adjectives+and+adverbs+exercises+pdf In PDF document text
    • http://xovenej.cascadegriffs.com/uploads/1/3/1/8/131856372/rifetijejixegamaw.pdfIn PDF document text
    • http://files.drgaranzuay.com/uploads/1/3/1/4/131453260/6883764.pdfIn PDF document text
    • http://files.lifewithsqueaky.com/uploads/1/3/2/3/132303337/gajawubebajakudekev.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/1/0436/7892/4953/files/case_interviews_cracked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/redezawozuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/vebimuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6525/3789/files/boston_legal_season_1_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/notedow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/xazoxewivexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/hex_to_int.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/clavicula_salomonis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/vawitekozawivoxuvoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/algorithms_robert_sedgewick.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 7

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_off000047fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47FE 5704 bytes
SHA-256: 1cefe9f72cbbe37e4ff0e05a175e897a5573f9041584fa18c58634f262644e5d
font_01_sfnt_off00005b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 11956 bytes
SHA-256: e5e3c82b95c00634380a89ca98109150b58398bd2377f4e227cb0008426d08c8

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