Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5cf6bdc880d8dc…

MALICIOUS

PDF

73.9 KB Created: 2020-08-11 05:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab73e8d1e0bb8a378985a5d9e5dc7036 SHA-1: d86fe77eade8862e577bafbbc1a9a276b7ec11a3 SHA-256: 6a5cf6bdc880d8dcb9a29dcbbd4527d9a51e37b068d82ce17ebab8a7eb93b19f
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=slavery+in+ancient+greece+pdf, which is likely used to funnel victims to a phishing or malware distribution site. The document body itself is heavily obfuscated but contains references to the malicious URL and other benign-looking Shopify links, suggesting a link farm or redirection tactic. No scripts were extracted, but the presence of a malicious redirector and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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=slavery+in+ancient+greece+pdf
    • http://files.cbd-iai.org/uploads/1/3/1/8/131871699/newefujaludexab-wojebemuvege-ninikapedewur.pdf
    • http://files.allendaleinsurance.com/uploads/1/3/1/6/131607163/mupevojizamufowike.pdf
    • http://files.a2consultation.com/uploads/1/3/1/3/131384081/kosilelov_zukozajawoxa_famuna_tiwaviralupom.pdf
    • http://sowuji.warrencojrfirefighters.com/uploads/1/3/1/4/131411896/ba944cd841db9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/medium_is_the_message.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/52579428557.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/nevawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/roxugoxesize.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/75878635596.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/38990955538.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/16517742544.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/vebupivutivuforatonunoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/getexalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/sopilugefuzitufexaguj.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_off0000d85c.bin
f8ac3e2ee4d119e9fc0665a98fc7a874041dad9f0e4b9e7c7f0325c903ff3c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 5088 bytes
font_01_sfnt_off0000e9b8.bin
8c5a3d13df3dac7f6ba72967f561feb986ecb04bc92cb50e5c795d563d1d2816		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B8 10192 bytes
font_02_sfnt_off00010c8f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 4324 bytes

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