Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5f289b13efea53…

MALICIOUS

PDF

38.0 KB Created: 2020-08-02 13:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21daab4559f2abb94527b48fb1dbd26e SHA-1: 65a79b05e716bee9f3ad1216ecb9a2912a8b2e99 SHA-256: 7c5f289b13efea53244a3ac74cab992b21edb13307fab975f9c862388578b0e4
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also assigned a very high probability of maliciousness. The document body contains a URL that points to a redirector, which is likely intended to lead the user to a malicious site. The presence of numerous embedded links suggests a broad phishing or malware distribution attempt.

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=golden+days+panic+at+the+disco
    • http://files.lifewithtoribrand.com/uploads/1/3/2/7/132712315/dodurejili.pdf
    • http://files.judymaeboutique.com/uploads/1/3/0/9/130969045/mipixi_masapab_minozibonefe.pdf
    • http://files.stjohnsuccbrighton.com/uploads/1/3/0/8/130813317/edf685d783c6.pdf
    • http://files.gardenstateequine.com/uploads/1/3/0/7/130739802/3cda86af53c9d37.pdf
    • http://files.shopluckylittles.com/uploads/1/3/1/3/131380511/tadeso-ditexefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28068876324.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/vavox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/bowolumiwesasugadujumeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/mesoful.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/rarekoner.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/fepejuniwifus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/4068063996.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/fibav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/kiwazokerox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/terejaw.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_off000056ea.bin
b714ad4274acedca0287850b3c8144db857af27e64fc0e4728dde9cfb262a8b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x56EA 5200 bytes
font_01_sfnt_off000068a8.bin
580d1a86930b2aebbf519cf697ccb6ad6c4a55280f68496fde1ba724b669f7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A8 10088 bytes