Malicious PDF — malware analysis report

Static analysis result for SHA-256 552a3629eff6eb42…

MALICIOUS

PDF

33.7 KB Created: 2020-08-14 20:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbc614dc9273935f36fb0568104bc87f SHA-1: 8809c39228401b6fb7018d233b3a31b305f81699 SHA-256: 552a3629eff6eb428d2e396d9c76d9cfc73589cf5f4a5412d5d92b9da4d3cd3e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One prominent link points to a known malicious redirector infrastructure at 'ttraff.ru'. The document also exhibits characteristics of a PDF link farm, with many URLs pointing to PDF files hosted on various domains, including Shopify. The primary intent appears to be the distribution of malicious content or SEO manipulation through a large number of external 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=mu+vs+arsenal+8-+2
    • http://files.buybacktheblockvip.org/uploads/1/3/2/6/132682093/2111636.pdf
    • http://jafezuze.heartearthhealing.com/uploads/1/3/1/6/131606066/tigubak.pdf
    • http://files.profiteffect.com/uploads/1/3/2/7/132740377/zesasufajewav.pdf
    • http://ladolovum.mississauganation.com/uploads/1/3/1/6/131606490/2791747.pdf
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/48405650327.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/19186183494.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/39735702675.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/givazukavejabexam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/92137385297.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/wuxuwojaboxokeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/33476308619.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/22497598179.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/chargesheet_under_section_173_crpc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/48706563494.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_off00004617.bin
9c100079799a5037232aecda078282b6a3e3df8e86c466f403c720c7e0b8f06e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4617 5104 bytes
font_01_sfnt_off00005789.bin
bd2a15f7589d9ac9272a3652e5c357b46832010f503a7cbe5d42d4c8102f6207
pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 10172 bytes