Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8aa0ced25404a8…

MALICIOUS

PDF

44.4 KB Created: 2020-07-29 17:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecea4914ff15382dd014ae24fece853a SHA-1: 059eed1e1f9264359b188c716f446683e8104421 SHA-256: 3e8aa0ced25404a8ac356c7f0f40b4dfb51fe26329f67f321213244454bd7b25
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=target+population+and+accessible+population+pdf
    • http://files.fedecat-uk.com/uploads/1/3/1/4/131437295/4935026.pdf
    • http://files.tinytownllc.com/uploads/1/3/1/4/131437471/9208199.pdf
    • http://files.kateyeungdesigns.com/uploads/1/3/0/9/130969220/1556579.pdf
    • http://files.sogchurch.net/uploads/1/3/1/4/131407944/zevajawewe_zoxidot_xoxajib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/lulojezufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/rujubumes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8502/0827/files/laxuzezukosibavakazewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/73616582842.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/bexigufed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/gevixosometigogosobem.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/29229115938.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/17477059692.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/7450640186.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7f.bin
eea27072cfcf118b338e01fdd2eba87affbd1d3dca6eb6197f147344f73aa794
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7F 5292 bytes
font_01_sfnt_off0000807d.bin
6523d88582dfb4d57e665b9ae6e6823ba966629fa1c21f8155ccd14571e4fa6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x807D 10428 bytes