Malicious PDF — malware analysis report

Static analysis result for SHA-256 868a590fcb7677f9…

MALICIOUS

PDF

35.8 KB Created: 2020-08-21 03:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2468c34790b63c10fd2ea809d44d2a1d SHA-1: bcb81921dadd63f67b45d92b692e37ee719da568 SHA-256: 868a590fcb7677f9d390c1125a2bc78b8247cf843936c8819bd047dd57486dcd
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a 'Fibre cement slates fixing guide'. This redirector likely leads to a malicious payload or phishing page. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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.cc/pify?keyword=fibre+cement+slates+fixing+guide
    • http://files.loveadelyn.com/uploads/1/3/0/8/130874569/newofiwubebofuwatiti.pdf
    • http://files.toddurban.com/uploads/1/3/2/6/132695568/wakasez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/volkswagen_polo_2020_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/25926923177.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/kenirovelimojujojela.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/ocean_basket_menu_2020.pdf
    • https://cdn.shopify.com/s/files/1/0450/2981/8532/files/suara_burung_cendrawasih_merah.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/9450946036.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/vilegasototo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/pakazepepune.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/vubewaxifijanitekuvugomo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/98978139584.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_off00004ca9.bin
552c6a7e719d9d406096cb0a99c85bed5702c0d8b701a5fbc79c83c5a8fd90ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA9 5504 bytes
font_01_sfnt_off00005f47.bin
67b35da53357bc659e98f33de981e468d0b322ccb82da3883be8d8f19f64b1cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F47 9896 bytes