Malicious PDF — malware analysis report

Static analysis result for SHA-256 60359b4b49431b23…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 14:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76f3f690cff0abb3556eba19896ec61 SHA-1: bd12c4b0b68c73d42f5d1b054092f33b7f1913ec SHA-256: 60359b4b49431b2373ad8b8090123ab6e6d45b8d05e5d78ef06794e3c0ce0aad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a redirector service, which in turn points to a Shopify URL. The ML classifier and heuristics strongly indicate malicious intent, likely to trick users into downloading further malware or visiting malicious sites. The document body text and embedded URLs suggest a lure related to IT certification study materials.

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=az+900+microsoft+azure+fundamentals+study+guide+pdf
    • http://files.stbrendansccm.org/uploads/1/3/0/9/130969045/bupafurubenupe-falasirumojave-kawerudapuxe.pdf
    • http://files.rosellepark247.org/uploads/1/3/1/4/131407818/mitovekozejof_safoto_gepupakawumu.pdf
    • http://files.terrraofwyoming.com/uploads/1/3/0/8/130815277/bosal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/mechanic_labor_time_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/97503456843.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/44776899023.pdf
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/pibawunewufufavewenebibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/wps_file_extension.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/negofazasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/pinowutugelavopiferivifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/bezidanigexufanuxovive.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/sekiro_ashina_sake.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/convert_image_to_grayscale.pdf
    • https://cdn.shopify.com/s/files/1/0428/8577/5519/files/rivud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/zafakemufoximurubesome.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_off00006aa2.bin
e710e299e1fbf2f1e4bf19e7a600ec6fd3a195f759bdaa2ed92b9992a154c61d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 5916 bytes
font_01_sfnt_off00007ec1.bin
6da8b5c94fe5cadc9379cb739914ab57f1c2c2820033c2cadad5016a801fb721
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 10412 bytes