Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d75b95981b3f78…

MALICIOUS

PDF

46.4 KB Created: 2020-08-14 16:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edf4ebf3b64389fc86d94765f42ecb05 SHA-1: d15e17aa55001082b00b56231c6709cd2ee6f032 SHA-256: f7d75b95981b3f786d678970ef6ecdfc092be7eb4daa56b130ef8ac998ae99ba
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=hope+all+is+well+with+you+formal'. Additionally, a large number of links to other PDF files hosted on various domains were detected, suggesting a link farm or distribution network. 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.com/pify?keyword=hope+all+is+well+with+you+formal
    • http://kigiru.light-surfboards.com/uploads/1/3/0/7/130776131/wabugulemuzan.pdf
    • http://vubuwolul.ifobookmarks.org/uploads/1/3/1/3/131379255/7b55551cd65f.pdf
    • http://dinadeki.millerjohnsonmedia.com/uploads/1/3/1/8/131856543/84c3658daa5f1ae.pdf
    • http://terolo.soulvisionhealing.com/uploads/1/3/0/8/130814328/tosulatokaseri.pdf
    • http://files.scrministries.com/uploads/1/3/0/7/130740175/tarilafunevo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3590/0569/files/kitab_abu_shuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/30686534262.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/likixijimifitibamovolof.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/bixogugaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/autocad_lt_to_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/28474098526.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/87159931705.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/limojonikitoxuzex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/57932850190.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/all_he_ever_desired_shannon_stacey.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ae.bin
b496ef52523feaf0fb09673d6a37e45d88bdba80e0097837df7ea12eda6f6dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 5296 bytes
font_01_sfnt_off0000899b.bin
4891445cfad4ec7e5c1d53cad6ae3b854402c3abe5ae7f9c0170ea94f6bc432d
pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 10304 bytes