Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5b9836b5779ee1…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 08:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94cdc06dd9feab6fb3432b4e8f631077 SHA-1: 94664e53f66c546896ca466da2218397c86e2407 SHA-256: 5d5b9836b5779ee1af7f908de3dee680e0fb607fa5d82e87a5b2d90911750fc3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs confirms the intent to redirect users. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=bible+new+king+james+pdf
    • http://mubag.hellosnailmail.com/uploads/1/3/0/7/130776299/vujomoxo-jumepap-nadogezej.pdf
    • http://files.jesusexplored.org/uploads/1/3/0/7/130776483/zekuloved-jexulanirimib.pdf
    • http://nedepis.galianographics.net/uploads/1/3/0/9/130969162/7412343.pdf
    • http://files.dadspaintingltd.com/uploads/1/3/0/8/130814353/529927fcd13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/pejefogosibozosavilepewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/light_reflection_and_refraction_class_10_mcq_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/human_skeletal_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/38302799257.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/27623737303.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/96597654265.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/xudakalepivovozere.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0327/files/xelalulexim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/taxefoxividofup.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/fawoxifuvokikavumitazal.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/rolelasavodawog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/gebaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/general_anesthesia_complications.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_off00006e7a.bin
9cb89f7e2c709d024c82dbc6773b68c9b0d1ecf8bd4df25102dd942fd9abc12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 5688 bytes
font_01_sfnt_off000081d6.bin
d81667599918a646c814f38f6d4706542f4d2571f3ea3827ade117aa0d887c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 10140 bytes

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