Malicious PDF — malware analysis report

Static analysis result for SHA-256 80520d21b02b95af…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 02:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f46a674f3b9292c23b1c965744bf001 SHA-1: 2926a5a3c93a33a8ab32147b2026eed11ca06de8 SHA-256: 80520d21b02b95af6a4f6850972c50f5a524921bb0228e6114a967842dcef1a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/wix?keyword=pi+nin+ya%25C5%259Fam%25C4%25B1+t%25C3%25BCrk%25C3%25A7e+dublaj+indir+%25C3%25BCcretsiz In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8bda8bdaa3984470a4fde9f2de22f781.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d0c5650c4a794adcad3e55f08093da33.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_86e0a1df3c06419284ae1ae96e394199.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0d6d4c694c47473d91aa38587d955fec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_180bab1df0fc4d8e9ea8f9ab08d461e7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1f625cbcf4794ec5883a050d4165a7bc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dd09ff8b39dc45ffbba8d63e1564af44.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/8541893464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/60413870522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/jaruwuxasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/34566529574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/tadixo.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 8

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_off000055fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 6100 bytes
SHA-256: 57281e17b7192ea8fd8338c7f18d466b59407576482f9be7cdafa1bc8e44c2a1
font_01_sfnt_off00006980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 11276 bytes
SHA-256: 06a58b71bd64be747cd47ea082521904efb74c94980ca3872b4b85a57f175744

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