Malicious PDF — malware analysis report

Static analysis result for SHA-256 767ebb22084fbaec…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 07:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87b7f8d405dfc4a9de787cc90ab4d1eb SHA-1: 270e769fabc463c0cbf7fa1fe961890265078e59 SHA-256: 767ebb22084fbaec68db43e4a02492a7911e708195286b080c53ebe3c224b7b7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=8051+addressing+modes+pdf'. The document body, though heavily obfuscated, contains references to '8051 addressing modes pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious links as technical documentation. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites.

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=8051+addressing+modes+pdf In PDF document text
    • http://files.apco-florida.org/uploads/1/3/1/0/131069897/519fc2ed4.pdfIn PDF document text
    • http://files.letsbounceaustin.com/uploads/1/3/1/4/131438490/7fc6525.pdfIn PDF document text
    • http://files.nasiiclothingstore.com/uploads/1/3/0/8/130873983/3256033.pdfIn PDF document text
    • http://files.harmonymusicacademytx.com/uploads/1/3/0/7/130739621/3455415.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/1/0438/3762/0386/files/kubatab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/pirova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/96236930986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/dawn_stone_pixelmon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/23647885116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/difodel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/bilupudibiderekut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/18747227360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/15871887594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/gabunuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/unity_simplex_noise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/30369195434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/nusususidiwisixagutorawo.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 5

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_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5744 bytes
SHA-256: 836a4c4b9df44c7cf76b584f352a45442a052eaee095367dd083757ae3e66ea4
font_01_sfnt_off00007900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7900 10152 bytes
SHA-256: 3701ec85658cf0354855b185e2ec237333f008e2ad5f297c79521dee5026bf1b

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