Malicious PDF — malware analysis report

Static analysis result for SHA-256 474a6804fb7b7c0a…

MALICIOUS

PDF

46.2 KB Created: 2020-08-09 19:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c956c4a9378d354241e579d72f0be590 SHA-1: 7d442decda2e9f6234e84d2e345c438224e09568 SHA-256: 474a6804fb7b7c0a5237c285d8c03cb395a91587b7952dd2ee549f91f27138e6
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to insurance policy downloads, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing attempt using a deceptive link.

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=bharti+axa+general+insurance+policy+download+pdf
    • http://sopel.trinabakerphotography.com/uploads/1/3/0/7/130776485/b63e1.pdf
    • http://files.jedidiahrentals.com/uploads/1/3/1/3/131380177/kabufukukuvede.pdf
    • http://livizorot.piperfayephotography.com/uploads/1/3/1/6/131636725/6594101.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/jilulilezomewuwifut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/sulelesaguvefivujomoguji.pdf
    • https://cdn.shopify.com/s/files/1/0429/1372/6631/files/gegobokikug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/71936171358.pdf
    • https://cdn.shopify.com/s/files/1/0433/1539/6776/files/32750059508.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/juvawufis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6554/files/zejafeviripasijukudip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/zajakenedezugaleva.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/27063163173.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/kotisex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/firutanoxatak.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/ponebevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/99778889965.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_off000072ae.bin
94db39ecc339472e0c02e341c20036bb3789310a4b583645216d7abbd6294c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 5728 bytes
font_01_sfnt_off0000864f.bin
7321a0cf2830774bcf44e515905e12dfce870cbaf63d789e3cbc9828b1e3ea8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x864F 10308 bytes