Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4fa7baf17d3001…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 02:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc73d4168fbb47c7188217f81b907636 SHA-1: 3c2b067b33f79925b5e8aa0bd25548b6a5873547 SHA-256: 6b4fa7baf17d300152dec3bc35dac986265d774363d301ae04ed4e3c38857576
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link, https://ttraff.ru/wix?keyword=caterpillar+3516+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure for technical documentation, likely to trick users into clicking the malicious link. The ML classifier also strongly indicated 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.ru/wix?keyword=caterpillar+3516+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/pewoxibenarube.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/instinct_pet_food_feeding-_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/ximosobakovujejon.pdf
    • https://cdn.shopify.com/s/files/1/0459/9385/3087/files/mtodo_billings_tabela.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/61233847331.pdf
    • https://static.usrfiles.com/ugd/b8c837_1704dd35a41148099ccebb10aa52a13f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e767dd5639445e2818aecc505d05f85.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d0c78823af452eb49be98f48523b22.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/75587558757.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/gonidaduribona.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/75858303551.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/70304261631.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d2c8329fb094d4db01d7011dc740726.pdf
    • https://static.usrfiles.com/ugd/3bca44_1bba959913d64a69ae98d8ba51263d3b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000525b.bin
dd240b1f8cf80322b11298e5cb83fcbcdcc390d377fe6d991875e592279e567c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x525B 5076 bytes
font_01_sfnt_off00006382.bin
d6599548ef1cad096b398bcdc890c4f58a17d95cade495ba2b48787da504da07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 10156 bytes
font_02_sfnt_off0000864a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.