Malicious PDF — malware analysis report

Static analysis result for SHA-256 64effb841e341667…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 08:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47ffc46703e94bf4ddef02d48796c6b SHA-1: b275c5656de57666c2ad1df9a5961ffd2d754e4f SHA-256: 64effb841e341667ac829a14febc126e32d292998b26624884a2ffc0e8423c44
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a PDF SEO link farm, with numerous links pointing to external PDF files, many of which are hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/pify?keyword=electrical+power+cable+size+pdf, which is likely used to redirect users to a phishing or malware-hosting site.

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=electrical+power+cable+size+pdf
    • http://files.missdavisluellalions.com/uploads/1/3/1/6/131636990/2077ff.pdf
    • http://files.popculturetragic.com/uploads/1/3/1/8/131856079/30963566a.pdf
    • http://sazoti.sweeteststills.com/uploads/1/3/0/8/130814297/4ec11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0455/8025/5397/files/two_dimensional_shapes_and_their_properties.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/ccna_exam_questions_200_125.pdf
    • https://cdn.shopify.com/s/files/1/0431/0122/5114/files/vabejugafagesedag.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/pixadagesariba.pdf
    • https://cdn.shopify.com/s/files/1/0443/5417/5132/files/mathematical_analysis_an_introduction_by_andrew_browder.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/vorexatarovupatadewisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/nuvipimebizuxidubavob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/hp_officejet_6500_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4403/files/xexadol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/21174704131.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/zezemozutamati.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/51602560670.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/what_is_testng_in_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/zapinajegevozojoza.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_off000064f4.bin
4dcc362ebafc6a36d3c4cae41166850896897e56fb46efd9af8a6d9dee15a74a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 5072 bytes
font_01_sfnt_off0000764f.bin
419286667b8bc34cc1db1103503bf008f6a2f309c070c23f0a9f00bb1679a3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764F 10148 bytes
font_02_sfnt_off00009915.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9915 4324 bytes

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