Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9a52a5fcc3f27a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-24 10:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d826e817e435dc7e566a38b6f0bcd4a SHA-1: 802b08c4677d00afeb398a704bc5642f9612cf2a SHA-256: 7a9a52a5fcc3f27a2d2c72f3e28c2677203e0e733ced972a08011c6d2b9e0683
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=android+developer+phone+2018', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, indicating an attempt to drive traffic to malicious infrastructure.

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=android+developer+phone+2018
    • http://gekuk.peakelectricbikes.com/uploads/1/3/2/6/132681579/kubogaludanejadobol.pdf
    • http://saguri.exeter-gog.net/uploads/1/3/1/3/131383483/f41b854539db.pdf
    • http://bodalabu.anna-needlepoint-pearson.com/uploads/1/3/1/4/131408899/lukewosifaroti.pdf
    • http://files.renichedfurniture.com/uploads/1/3/0/7/130740130/2a3e3a9e17d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/degudoxirane.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/diabetes_type_2_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0465/9023/0693/files/xamisidoledewujet.pdf
    • https://cdn.shopify.com/s/files/1/0448/0122/8951/files/archicad_23_ita_crack.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/voderipekirenir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8866/6017/files/motirutoxufoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/46013147444.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/modaruxijaresafiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/ultra_ball_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/effects_of_air_pollution_in_points.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/taxovagarivedexef.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/banking_awareness_book_by_disha_publication.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_off000066cc.bin
fcbe32ec7a5e30deb9d8906a52af1963977fc7d74da2b77fd6ee5d5a28abd5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5228 bytes
font_01_sfnt_off0000789d.bin
d391d609a837b974b78fed881ba84698e9885a977ac42e3eebe89082ac9dcd47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 10548 bytes

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