Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffba027c36978d5…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 19:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf3f1c94911927949dddb58edce0bc95 SHA-1: 05b1882666b3be3f6a22f1bea64e06d605ffde95 SHA-256: 7ffba027c36978d52c025b8e342ec4c2a6137d54245d6c02527ea55783b282be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which are hosted on domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains the URL https://ttraff.ru/pify?keyword=cattle+diseases+symptoms+and+treatment+pdf, which is flagged as malicious. The presence of 19 SEO-generated PDF links, many pointing to Shopify domains, suggests a tactic to distribute malicious content through seemingly legitimate platforms.

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=cattle+diseases+symptoms+and+treatment+pdf
    • http://rozajov.stellawilkinson.com/uploads/1/3/0/8/130814328/zoresaxarimu.pdf
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdf
    • http://files.stumpysfabworks.com/uploads/1/3/1/6/131606011/86d8801f973.pdf
    • http://files.labuffco.com/uploads/1/3/1/4/131453109/5770d.pdf
    • http://razitola.complaintadvocates.co.uk/uploads/1/3/0/7/130740178/maxaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/foxig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/nevatumafiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/litavekewujafotalive.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/marorar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/pimazedeluka.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/how_to_check_gpu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/75144084487.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0886/files/bachianas_brasileiras_no_4_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/fofupilamigalaberewelenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9576/files/jafikufoxumilubun.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/xuzopijiporer.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/41226833065.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/mukuganeguvurajoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/john_deere_l120_parts_diagram.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/
    • https://cdn.shopify.com/s/files/1/0431/3523/83

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e13.bin
2cdfb1380a71ef58fda67d1d3721029588621af021ebd1b7ce3390ac701f694e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 5196 bytes
font_01_sfnt_off00007fa8.bin
d167854c5524c20289875383e7c5cfe41ac54a131af35f7c87f8c446640b2218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA8 10640 bytes

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