Malicious PDF — malware analysis report

Static analysis result for SHA-256 1396f6e401588aec…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 08:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3add2d2560a56a21f551031a5054b25 SHA-1: 4e3252a6b502cf164e8a9af6d7b65aec97fcc717 SHA-256: 1396f6e401588aec4e9accdda69b3e4fcae425770f5b22852401926ffb68670d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL associated with known malicious infrastructure. The document body, though heavily obfuscated, contains the same suspicious URL. The presence of numerous external links, many pointing to benign Shopify PDFs, suggests a link farm or SEO poisoning tactic to mask the malicious redirect. 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.ru/pify?keyword=braum%2527+s+nutritional+information+chocolate+shake
    • http://vurivower.villacalucciola.com/uploads/1/3/0/8/130874330/tasiwuwel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/8265666865.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/78497578428.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/delizulixabedawopozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3548/3551/files/ecosystems_and_biomes_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/teacher_s_guide_grade_10_wellness_massage.pdf
    • https://cdn.shopify.com/s/files/1/0463/1239/0821/files/biological_science_scott_freeman.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/vuwarolijoxedapesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/pedugusebezuduwunovebavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/88146711458.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/nerokebit.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/dekujir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/riwebexegisapet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/46377758750.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/reliance_industries_annual_report_2011-_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/xepulonevagipurenonu.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_off00004d8a.bin
4033bbf8805ac63f1c1ef9ccff7b9181b3e29d1ff9b120098861dfda949893f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8A 5268 bytes
font_01_sfnt_off00005f43.bin
414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 1940 bytes
font_02_sfnt_off00006879.bin
0bb1d7e36855da77374beb416846bf98ba070320292d88772bbb3252f40a3954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 10344 bytes

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