Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dbb69a02e64aac…

MALICIOUS

PDF

43.5 KB Created: 2020-08-20 20:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e4ea299f3c5ae1162ad399e89303a6b SHA-1: 7e6af435766d1b4be214e520b52e4bd8d6fdd3b3 SHA-256: 87dbb69a02e64aac6accc42a87e66bd7d930a2d0e5b3f1f322d59a8decf6011c
194 Risk Score

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The document body, though partially corrupted, contains a URL that points to a redirector, which in turn leads to a link farm. This suggests a phishing or scam attempt, likely using a lure related to educational content to trick users into clicking malicious links.

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.cc/pify?keyword=worksheet+for+commutative+associative+and+distributive+properties In PDF document text
    • http://files.alioni.org/uploads/1/3/1/4/131406075/kapekakijababanibuv.pdfIn PDF document text
    • http://files.hencecounseling.com/uploads/1/3/1/4/131407493/9063356.pdfIn PDF document text
    • http://papagufa.nickholes.com/uploads/1/3/1/3/131398222/f3d72.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/1/0431/1734/6965/files/google_translate_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/bamefojoxunuged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8116/1111/files/firaworosijoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/57571561823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/back_button_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/33178669892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/3474759478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/votigotikajiwepupijuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/rival_ice_cream_maker_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/dimilezerofifijeleputenot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/mefux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/limimedokolazelunivam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/sevasawugewubix.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5624 5640 bytes
SHA-256: e5f5e0672f58c9d3f95539e7e7e6ed95ec50773af5716b2d4808564102f2e759
font_01_sfnt_off00006940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6940 9840 bytes
SHA-256: e2b59e9e0baa7020226d1724338f4de8fc02e2bee1a7a71c9e7ac3df39bd09c2
font_02_sfnt_off00008b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 16116 bytes
SHA-256: 586fd2d47d7ef655ac8fcedaf3a17ac43b55ee34544d24df6525aba8b365c669