Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4ad228a3614f22…

MALICIOUS

PDF

53.2 KB Created: 2020-08-07 00:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4b873135820786251803d60c8b86d81 SHA-1: dccc727fbec36679f24e193e4029554f587e961d SHA-256: 5b4ad228a3614f22261178677b4d3b30aa7067d35fa073a169bc3ca17672efd8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=asturias+guitar+duo+pdf, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or redirection tactic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection attack.

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.ru/pify?keyword=asturias+guitar+duo+pdf
    • http://tofeto.curiouscreativecritical.com/uploads/1/3/1/4/131453329/d33341.pdf
    • http://files.honkrenaissance.net/uploads/1/3/1/6/131606373/db608aa18d53.pdf
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/sifarufivuzegifokofix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/dededibeluraxuganij.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/vofofewudobixatem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/ancient_civilizations_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/12114013410.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/3130382549.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/20571019108.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/jakepivol.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/14235589796.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/leledujivomusimopib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/rimigekawudarulerodefov.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/zezaveminevez.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/dolutirogas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/84777206784.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780b.bin
2199110ddd94642ac0cade713a045e82993c63678245d1aa5b55b2a4501650c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780B 8644 bytes
font_01_sfnt_off000093ad.bin
623a1fa5b053940db5e05d90a9ce41b90c5dd5bfcbd21c79cc4a4229df921c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AD 5164 bytes
font_02_sfnt_off0000a551.bin
1fcf05c7ab7ca3fd5b4f997c5d2f982d7bbcd189992093c5c8a8d74a173f99f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA551 10068 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.