Malicious PDF — malware analysis report

Static analysis result for SHA-256 6217d1da08907ebc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-01 01:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddacaec82027a0fc97b78415f3430165 SHA-1: 2fc3ae5bade999db57a76d20a4151414c4eac7f7 SHA-256: 6217d1da08907ebce411318d9e992bf915939067358353d95a7283d587f58109
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector to 'https://ttraff.ru/pify?keyword=99+thieving+guide+osrs'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external sites.

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=99+thieving+guide+osrs
    • http://files.corshamcreativemarket.co.uk/uploads/1/3/1/1/131164295/9ff337227bac4.pdf
    • http://files.letphilosophyshine.com/uploads/1/3/0/9/130969693/9921787.pdf
    • http://files.barnetselfstorage.com/uploads/1/3/2/8/132815753/5034760.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/nofanilufogafiponutarevig.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/negoxikejimuvavoketejane.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/fibedazomebodiwumadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/43547911951.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/zenagizapokinijaxanes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/86603290675.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/mowijoxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/kuzidipelitorexuzuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/10323368316.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/kadeturexex.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/dabawakewubil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/rireb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac7.bin
2a8764bbcf30f732c453e0836060ac9e3c042eee92f00aa3debd1ac369393b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC7 4968 bytes
font_01_sfnt_off00007bac.bin
ae3b68cd00470089da4d974a1921fe3150d2610a11df9df9833c93f5490a1b8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC 10236 bytes