Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3d5afe0937ff1c…

MALICIOUS

PDF

38.6 KB Created: 2020-08-24 14:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e151bdc5c7f56884f8b5596c56301972 SHA-1: cac7eb101dd9a81ec547207234463a5dd261d4c7 SHA-256: 2e3d5afe0937ff1c2aaca1f32f7d6e641d36641c19769fb5d926614512856d3b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=domestos+thick+bleach+safety+data+sheet`. This URL is embedded within the document body, which also contains numerous other links to PDF files, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive document title and embedded malicious 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.com/pify?keyword=domestos+thick+bleach+safety+data+sheet
    • http://files.lissawozniakphotography.com/uploads/1/3/0/8/130813885/1130510.pdf
    • http://zudaludi.unitedsafes.com/uploads/1/3/1/4/131407164/4577745.pdf
    • http://files.eliasonfoundation.org/uploads/1/3/1/0/131070452/2a411c2d8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/93168645051.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/xobexoronizogetala.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/wikavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/gopaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/toro_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/creative_brief_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/9517547832.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_off000057fa.bin
9b43ec3f6ce9c550c20fac6e19208a40bbaa06ee912ddc49362375401a9f6628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FA 5468 bytes
font_01_sfnt_off00006a82.bin
db342079143a2e0d7f3888682994523d895eb4a94d9d9f368e87bc34ddfab902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 10344 bytes

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