Malicious PDF — malware analysis report

Static analysis result for SHA-256 39242790baf56012…

MALICIOUS

PDF

109.1 KB Created: 2020-08-07 09:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2d98cc71b91753468265051920cced3 SHA-1: 5b421db3027f7096e71940d2db5f0dd12367cfe7 SHA-256: 39242790baf56012a9835529b27127d551115870321b4593bfd8b62a1338c88d
152 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 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness.

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=project+report+on+financial+performance+analysis+of+a+company+pdf
    • http://vuzuboseg.redsquirrelconservation.ca/uploads/1/3/0/7/130776046/nopizesinim_gizisixenaf_lepamurifike.pdf
    • http://files.scenerychanges.com/uploads/1/3/0/9/130969220/jinogemimixumu.pdf
    • http://files.turkeysmusical.com/uploads/1/3/1/4/131437443/najomibu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/zevimuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/87377790527.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/92084546104.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/ronigusanasetuwagis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/gastrostomy_care.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/wuvutijalofekafarubebuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1671/files/74901192988.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/topojojasutakiziwajebit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/zozizegovemuwigudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59854739703.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/powiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a4f.bin
9a98723dae936e7c7c8d502cfbcf27bf9f93cff28ba6a06675a6a95244fbc4de
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4F 1696 bytes
font_01_sfnt_off00016279.bin
4386f545c945b02c13ea8866694e0cf4262f8d3007ec9ad821115966586b877f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16279 5480 bytes
font_02_sfnt_off00017513.bin
c11b50ce2680e122c6ceaf77dd80d8b8410d019395787abdeab58a1a4ccfe92e
pdf-font-stream PDF embedded font (sfnt) at offset 0x17513 15620 bytes