Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1a18a4e494db76…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 15:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 769b092854d2b110ac4428b63618bfe4 SHA-1: 7a8d469ba9989740dac3d15c1b22a860217740a1 SHA-256: 0b1a18a4e494db760a465bbe0a4f264c8eb227c1e9afb3692e0ad1ef8725be78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host SEO-optimized PDF documents. One prominent link, https://ttraff.com/pify?keyword=bravais+space+lattice+pdf, directs to known malicious redirector infrastructure. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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=bravais+space+lattice+pdf
    • http://files.juliemidkiff.com/uploads/1/3/1/8/131872021/kategunob_kixitoruju_xukufubenesujit.pdf
    • http://xatefe.ilspiritofficials.com/uploads/1/3/0/7/130739783/1563047.pdf
    • http://files.visceral-entertainment.com/uploads/1/3/1/6/131606127/lafizuf.pdf
    • http://ridopoweg.emilyjordansmith.com/uploads/1/3/2/7/132710712/mezojekaxo-gasoguw-watiginulemuj.pdf
    • http://wufiju.brightlight-customs.co.uk/uploads/1/3/0/8/130813577/ruvejarise_rituzo_xujefotujivudag_jijirudawudas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6081/files/90400627221.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/weighted_standard_deviation.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/35649283140.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/40199275449.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/1993939961.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/17298999124.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/tamale_spreader_at_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/82408895834.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/8425917201.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/shadow_priest_leveling_guide.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_off00006398.bin
7ec8b764f849dff2348466c43280aa499d6c2b02af883a2c7392e46323e06e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 5256 bytes
font_01_sfnt_off0000758d.bin
223964c733c94a1dee18b869ebe722be68dc0ac4d2c978d42f6f07159820103e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 10804 bytes

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