Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b77721effcacc2…

MALICIOUS

PDF

46.0 KB Created: 2020-07-29 16:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fd3c3de9007636d048f6d01ce00ceb7 SHA-1: 32e674ccde2e34ddfc239a247f5705d157184679 SHA-256: b5b77721effcacc205af9d5f0e73d0243c6a19bf56cf3aaabc6e5961ffa00027
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identifies a PDF link farm, with many links pointing to shopify domains, likely for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains keywords related to 'bpsc question paper 2020 pdf', suggesting a lure to trick users into clicking the 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.com/pify?keyword=65+bpsc+question+paper+2020+pdf In PDF document text
    • http://files.kfnlaw.com/uploads/1/3/1/4/131453021/buvetevawosix.pdfIn PDF document text
    • http://files.clubvaultitudetexas.com/uploads/1/3/2/6/132695388/15c86f9f67bc69f.pdfIn PDF document text
    • http://files.gatheringofghouls.com/uploads/1/3/1/1/131164479/2b08d3f8345b.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/1/0437/8555/2030/files/tilusopatawafetazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/69286642861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/vaxezolokajurorisape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5349/8014/files/89726505752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/51832649514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/firetezuzafifixetun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/76179237871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/12557526367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/vowupatukutawadizawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/62440248067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/komozofelasiponunekofuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/pikuwexuvuvutexesipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/kasamunerivojuwuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.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_off0000757c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757C 5720 bytes
SHA-256: 8edb21e5c793564d8a326751bc854748387f87ce23b824216cf9496c3fcd4b7a
font_01_sfnt_off000088ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EC 10012 bytes
SHA-256: 93ba682b8bf3f41ff8cdaeece4a375542105ad22796b51f801c3b39d78e6aef2

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