Malicious PDF — malware analysis report

Static analysis result for SHA-256 028d9165079a4dde…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 23:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916230b549a8a82eb217ad5e8b003c2a SHA-1: e0a0546e5823c878129ceb832cf292d182100e23 SHA-256: 028d9165079a4dde09d4a4176aa709bab526f78603b3af333dc374c2ae33e36a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a template for an electrical distribution board circuit chart. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector.

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/wix?keyword=electrical+distribution+board+circuit+chart+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8090/8954/files/63360523814.pdf
    • https://cdn.shopify.com/s/files/1/0431/7000/5156/files/seddon_basic_helicopter_aerodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/97228714365.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/lezilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_e9fe7b29a48145f58b339f0769eefeb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6e59eb4dbb846f589b48d741d55e5f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c369762975a41ddad84b8131cc23851.pdf
    • https://static.usrfiles.com/ugd/22739b_8ecadb2a877742d19a1e6223d55807ce.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_93a94381aa784ab5b6ee771a1c8afac2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/lv_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/bankers_adda_current_affairs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/fumazav.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/gear_patrol_gift_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.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_off0000579a.bin
cbf6dd66a4a664440f32b6b99e9c5458c81df682e793da8b0e82724d1a3cf693
pdf-font-stream PDF embedded font (sfnt) at offset 0x579A 5412 bytes
font_01_sfnt_off000069c0.bin
2e2b60edcc01f6e3db119b43a20ee887ba7589734839356f050561fa65de4b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 9792 bytes