Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09077ac9ab864a4…

MALICIOUS

PDF

50.1 KB Created: 2020-07-26 18:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d14aca18cd6f4cc085e2eb8c116e0074 SHA-1: befbb058188e4b77e8829e5f070a16adda2ebd83 SHA-256: b09077ac9ab864a40ed9800121773f39c343ad0d08ec95fea4ea3c0140089546
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a phishing or redirection scheme, likely to deliver a secondary payload or lead users to a fraudulent site. 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/pify?keyword=circle+of+fifths+pdf+guitar
    • http://files.drawcollar.com/uploads/1/3/1/4/131438784/sujelaxakoze_jomot_borif_malagixer.pdf
    • http://files.freestylefitness.nl/uploads/1/3/1/4/131406811/8700030.pdf
    • http://files.jaybleeng.com/uploads/1/3/0/9/130969663/d21daf1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7554/files/fijebaturijiwegutex.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/jitexut.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/nefekawetunidezalop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/bixepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/xozabetowuzenov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/93762698361.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6646/files/sozadoxozetidigelinir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/11230962366.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/tipomimegogodojevegeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/52911726181.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f61.bin
d01e5065a393f53782f4b8d8f87929d181dfa3f46e05a8102606cf7d91d73ef8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 5216 bytes
font_01_sfnt_off0000812f.bin
9b07344ceb52aa661c5387678986dc3cb4ada8f2411d026eea7efea9c1e02602
pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 10304 bytes
font_02_sfnt_off0000a485.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832
pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 16120 bytes