Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e23d7b47674e670…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 19:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26d7961c1fc4eec421a6f805758e87fb SHA-1: b3afd72a47e73887142bc5f73a928f37f2baaa9d SHA-256: 6e23d7b47674e6702ec5b2b7cdb5037a9f9ed3a412c523c895aa03b0bd288e2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL identified is https://ttraff.cc/pify?keyword=introduction+to+advertising+notes+pdf, which is flagged as malicious. This suggests the document is part of a SEO poisoning or link farm attack to drive traffic to malicious 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.cc/pify?keyword=introduction+to+advertising+notes+pdf
    • http://files.gmbcgulfport.com/uploads/1/3/0/9/130969403/vakupubaz-lodunupen-vujematuxakixad.pdf
    • http://files.newteachersretreat.com/uploads/1/3/0/7/130775592/sogorogejew.pdf
    • http://files.embodimentjanis.com/uploads/1/3/1/8/131858916/vuburefuzodod-xokotumepek-xugojadetami.pdf
    • http://files.frohockministrycostarica.com/uploads/1/3/1/8/131856135/wigenix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/jeribonedozitadot.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/redipigofaporijesexapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/mowabinijirutexovojox.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/zojexag.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/ranafibuve.pdf
    • https://cdn.shopify.com/s/files/1/0436/0444/3299/files/wozenegefeduxujuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/70968568955.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/lorumolejotafinut.pdf
    • https://cdn.shopify.com/s/files/1/0447/2219/2537/files/tennessee_williams_the_glass_menagerie.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/16620077739.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/vitipodikeraloxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/43602495737.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/jexejefil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007311.bin
9a6dd84add49f82e4a9bfc66fed617e47c200653ee593d77e87452e7ab132ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 5288 bytes
font_01_sfnt_off00008521.bin
326ad0441453c29a138661a9e1018d2d005e44fa9595e79bf48765f6388a8b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8521 10772 bytes

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