Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ef05c306f557ee…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 13:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceefee4c6dcade0495ba7aa73473489a SHA-1: 0ffd6d4ce7feb81565d821f9351286936c63d6c9 SHA-256: 78ef05c306f557ee12b770989e7ed562f593c967afc3316309e4bf3bffe9de0e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a company profile, likely a lure. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, potentially for phishing or to download further malware.

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/pify?keyword=interior+firm+company+profile+pdf
    • http://files.charis.org/uploads/1/3/1/4/131437881/1b0240f80d81215.pdf
    • http://nusalij.andreas-skincare-bodytherapy.com/uploads/1/3/0/7/130776433/06ec06a8d89c8.pdf
    • http://files.fabuliciousteaching.com/uploads/1/3/0/7/130738534/rulujezajit_suretugu_nogigepevavapu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/sudagiduwuwotoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/70883732518.pdf
    • https://cdn.shopify.com/s/files/1/0431/3088/0162/files/budurizejaliwakeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/76012376599.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/situbelimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/5947482669.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/nisomub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/50569683843.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/kaputip.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/abzurdah_completo_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/16924515599.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/49831059686.pdf
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/58668262205.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/72926513959.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_off0000653a.bin
81a4887b438507c84f7e7f60e542d14ee7e3cf065f437dc1b051e63c25f341b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 5160 bytes
font_01_sfnt_off000076bf.bin
6e26dc5b9cafb5d5516ab6813d671d0fabfc2dc0768a9a2c7da5917f014dc58e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 10148 bytes

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