Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a940849b2201bff…

MALICIOUS

PDF

54.1 KB Created: 2020-09-03 21:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5855691d52b9c5e7c120426ac75d77bd SHA-1: dae0ef763fe62c3eb11236a9e5eb07eb1caa0b1a SHA-256: 5a940849b2201bff1f7666c4c4db4bc643107398418f0e3a2746dc6499a3fe5f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a link farm, directing users to external resources. One prominent URL, 'https://ttraff.com/wix?keyword=cost+of+living+index+excel+spreadsheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting a phishing or scam attempt disguised as a spreadsheet resource. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=cost+of+living+index+excel+spreadsheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/5489/0913/files/nixufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/gevutaxexubakurukitubibuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/cathode_ray_tube_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/76693161562.pdf
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/avatar_korra_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5793/7561/files/python_read_json_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/convert_base64_to_file_php.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/demakulinupafax.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/90615953963.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/12118365141.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/castrol_magnatec_professional_10w40.pdf
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/tepofibonubeded.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/92196690781.pdf
    • https://static.usrfiles.com/ugd/a4d998_899102a7fec746029c94e13b3a29d83c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6750a3ee64b34a2597d692cbba752b09.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_b1f9455cc2b14b5d934404d11e3d1ab7.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_off0000944b.bin
4d55d7c2669c263d4b34b4f4444191fcbe1d90c8cc597f41d491b94f013df85e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x944B 5448 bytes
font_01_sfnt_off0000a6de.bin
fcddb4925337612f8ee97da55c9f38a6f440eb6c827d7b166e2560207520d081		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DE 10652 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.