Malicious PDF — malware analysis report

Static analysis result for SHA-256 077955d4e49694cd…

MALICIOUS

PDF

36.1 KB Created: 2020-08-21 16:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 944c24988f47cc04097bc32e4426cc2b SHA-1: a56e3b87c1ece9054c5c389b7b38b444bc01e174 SHA-256: 077955d4e49694cdafa228cc6b99e37030303af3b9c830cc1f0966fb644d3d0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its role in directing users to potentially harmful content.

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=mantu+chhuria+desi+pila+video+song
    • http://files.annblackburnpoetry.com/uploads/1/3/0/9/130969699/d4d48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/fukak.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/67859220915.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/80366193188.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/92988645737.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/batman_the_dark_knight_returns_comic_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0463/0980/2146/files/77172219132.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/61268684995.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/68665266694.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/nixixomiporejezijiwepivex.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/hp_2000_notebook_pc_specs.pdf
    • https://cdn.shopify.com/s/files/1/0455/3664/1189/files/caste_obc_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/73078405393.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_off00004794.bin
f435dae85fb870420124e10726a367bad33a9efd8acd3d402ce1a50ae13a2101
pdf-font-stream PDF embedded font (sfnt) at offset 0x4794 5400 bytes
font_01_sfnt_off000059f1.bin
8b2ab42dcf9e14d3434da05aae8af0bfa283c954df32b0a4b8ddf1b7bbb630e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F1 13160 bytes