Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ed3ea4c832775d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-09 12:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b1b9f2ca7def3ae881836151d876bb SHA-1: 2169577a30b78129cc57df619ef388a6299def21 SHA-256: d1ed3ea4c832775dfce78f7910fb5a383a025c1b765dbb6e06fdac2909a4e9c6
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains references to 'Bajaj boxer wiring diagram pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier 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=bajaj+boxer+wiring+diagram+pdf
    • http://files.yourdayrentals.com/uploads/1/3/1/3/131383583/korezilom.pdf
    • http://files.houseofangelcardreadings.com/uploads/1/3/0/7/130740062/marejogelokezaxikaf.pdf
    • http://files.rarebreednationllc.org/uploads/1/3/0/7/130740504/3bc46ae.pdf
    • http://files.hackneykeepournhspublic.org/uploads/1/3/1/3/131378868/jesenixuwejinazo.pdf
    • http://fumen.bckaleidoscope.org/uploads/1/3/1/4/131408100/6b714.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3967/files/recetas_dieta_cetogenica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/72150842178.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/daxiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/9828266267.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/tipos_de_vinhos.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/fuzera.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/77378570896.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/tikav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/jomotofefapevipexef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/fibowerefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/balanza_de_laboratorio.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/89754124643.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/laguvetidosawebutabizaxa.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_off000054dd.bin
4e48466dfacb0f3fb20a8c56da682b1e1436e5e1e2e444e24472ecb80507f8b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DD 5576 bytes
font_01_sfnt_off000067dd.bin
51bc7e32374395eba15b7d469aaf2a1c6ee9746955a87690c9caa6519a0ab964		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 10360 bytes

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