Malicious PDF — malware analysis report

Static analysis result for SHA-256 0894b7317fc91f34…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 11:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e7983a4b12f696e574802fcecf82ce1 SHA-1: 47d81091a4888e317b40af986c04a4d08d965c9a SHA-256: 0894b7317fc91f3423395ed9ab7b80d1e7d683a44134da6e44fd68e4dd8d1c15
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix'. It also exhibits characteristics of a link farm, with numerous embedded URLs. While the document body is heavily obfuscated, the presence of these malicious links strongly suggests an intent to redirect users to potentially harmful content, such as phishing pages or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=punnett+squares+dihybrid+crosses+men
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de60da_9747afa108ad48f6960ec35a6358a16d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2980f03b62a040bf9d78b0240be816ca.pdf
    • https://static.usrfiles.com/ugd/739437_ce7807f3af524c3e85dd971e3de119d0.pdf
    • https://static.usrfiles.com/ugd/5a1791_426eebd43046461193998c7c07adf5a1.pdf
    • https://static.usrfiles.com/ugd/5b9365_0b41fe93d9f3473589d4bd131806e1d0.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/vizio_tablet_wont_download_apps.pdf
    • https://cdn.shopify.com/s/files/1/0434/4735/3511/files/34472782439.pdf
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/mubegudanawimumepebefaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/epson_c2600_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/consulting_agreement_template_california.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/4476032865.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/42836141016.pdf
    • https://static.usrfiles.com/ugd/286fb8_1f087eec00014fa5ac2995b3363b8db9.pdf
    • https://static.usrfiles.com/ugd/b8c837_53337afdb6c94c1f90b3092bd5c9f59d.pdf
    • https://static.usrfiles.com/ugd/66c878_33d1d0ba742f479fb34d33d35292c255.pdf
    • https://static.usrfiles.com/ugd/de3d83_350b213c6a2847a3a64bc9c60a9e2381.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_c233ba0ab7b9489490847be3223aa338.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_off00006342.bin
ec8a742a3a99068b58b794b6f2b5a9c98818d94ce6969b6489b5ba84f859fa6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 5516 bytes
font_01_sfnt_off000075cb.bin
049de2695e4deeb57104ca8175cfac06b13ce6d0de955f2544e93fe665beae7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 10712 bytes

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