Malicious PDF — malware analysis report

Static analysis result for SHA-256 134bc0390a615ded…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 00:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3abcb03b2d900911c473b96d9215f36b SHA-1: 2a3676bf7fc2d50a0f3d332c050275a6404d6503 SHA-256: 134bc0390a615deda6c7c902de6b885fbb60455f831adaa74a01977a7a107663
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many pointing to a redirector service, indicating a link farm or phishing attempt. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of many external links, including to Shopify domains, suggests an attempt to distribute malicious content or redirect users to phishing sites.

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.com/pify?keyword=formulierungen+englisch+klausur
    • http://files.shisko.com/uploads/1/3/1/4/131407918/4336510.pdf
    • http://files.nickspillerportfolio.com/uploads/1/3/1/8/131856195/7061611.pdf
    • http://files.barbchuko.com/uploads/1/3/1/6/131606343/ludutunesi.pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://files.harlemvibes.com/uploads/1/3/1/4/131408204/kekezitipivij-giluwolineso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/9865/6158/files/50396181076.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/98904482056.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/wovudezufadabomopumivime.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/5501134215.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/49658229381.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/46140442513.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/73178613315.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/64095458377.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/perob.pdf
    • https://cdn.shopify.com/s/files/1/0452/5198/5565/files/icons_for_email_signature_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f7.bin
61416b94b4cbf06ae58db27e7a3821a42471de3598102c7764f3918be7a2ac02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5032 bytes
font_01_sfnt_off000073d7.bin
c11ad7a3bab918e23e3328183f3d3395a8fb13671422ceb2e28a347750b48fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 11080 bytes
font_02_sfnt_off00009843.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9843 4324 bytes

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