Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f150b5b7dcad7…

MALICIOUS

PDF

41.4 KB Created: 2020-08-27 16:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ad1495b463c83e458159fd2fb76e9a SHA-1: 6421fb7a9a7c1f7e2f61d6f1d89ce7fb6e9d7a2b SHA-256: 789f150b5b7dcad7e6824548d308925e1bea6446df0020ba9d609f784d4f995a
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, but one critical link to 'ttraff.cc' is flagged as a malicious redirector. This suggests an attempt to lure users to a malicious site, potentially for phishing or to download further malware. 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.cc/pify?keyword=lacher+d%2527eau+barrage
    • http://files.eplabelexchange.com/uploads/1/3/1/3/131379716/tigipifizitajele.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/42526316126.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/mibugejezuvosobibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1339/6901/files/wiwebiwofisibikojaziwume.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/gevarogevidi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/optional_java_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2265/files/lab_report_mla_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/98253338695.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/nurewefobusidivupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/jovuxitexiso.pdf
    • https://cdn.shopify.com/s/files/1/0441/0481/0648/files/formacion_de_los_galacticos_del_real_madrid.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/access_consciousness_bars_manual.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_off00006048.bin
70f0a33cdbf9fe7d60cd3a2a3d1ce94034a67067cd79ac683ad34f93bc499c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6048 5108 bytes
font_01_sfnt_off000071a0.bin
44e0ed98bcf0484004907535ffb51efd1ccd7eaad37b84735a00a941810690a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 12116 bytes