Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b13305938a5cda…

MALICIOUS

PDF

133.5 KB Created: 2020-08-06 15:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add8ab9737da6dcab69b7e9774f57b99 SHA-1: 614019e0743a9a4132dee700df70a704d5e7ec0f SHA-256: f4b13305938a5cdab818e9b990a922e0f9f2a38df3c1e68e6cc6b4acb77854e5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This indicates the document is designed to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that triggered the heuristic, suggesting a lure related to 'history of anglican church pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=history+of+anglican+church+pdf
    • http://files.emberlense.com/uploads/1/3/1/4/131407493/9b081d.pdf
    • http://xokefase.mantra-translate.org/uploads/1/3/0/7/130738837/f0070d84b950010.pdf
    • http://files.miniphysio.co/uploads/1/3/2/8/132814073/lewoxefel_nunufaviwiloro.pdf
    • http://files.brightstarastro.com/uploads/1/3/1/6/131606069/panozuvijakexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/75795175149.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/getozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/62275863692.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/pronoun_agreement_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/5259864738.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/92412512579.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/89155586443.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/nagodazozerudenigekulaki.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/69491533035.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/40526953222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/wonulimijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/24675579995.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d18c.bin
596ad8008eb11048bb269c3afded476cb26d4e44bc58ef1c61f1d4a3daefbc71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D18C 5480 bytes
font_01_sfnt_off0001e432.bin
af130162e678f2ed950d22b745574335f15db81acc4e6ff832fad633e3e84439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E432 10876 bytes

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