Malicious PDF — malware analysis report

Static analysis result for SHA-256 077575c7f09af146…

MALICIOUS

PDF

55.0 KB Created: 2020-08-20 03:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9552db88aa3c725e735534f64ea7c232 SHA-1: 3b6fbd5b88e0ceef9507e3278c9f66eccfd63e7d SHA-256: 077575c7f09af146ea17a759aea66433de8c4c0c4f0ac0747701c2e6384cfda1
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though partially corrupted, includes the same URL and references a 'Leica m guide', likely a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=leica+m+guide
    • http://files.curtfongervoice.com/uploads/1/3/2/6/132680922/afff143d3b98924.pdf
    • http://tawuletu.tomphillis.com/uploads/1/3/0/9/130969504/bozulepomon.pdf
    • http://josuv.sigaljacobson.com/uploads/1/3/1/8/131857445/04b0a411f7eb3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/nafujoveguwur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/86156140408.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/75097601908.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/64457863676.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/89013870576.pdf
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/jukigopavadif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/fabimefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/wepovopelumowomemiduvoda.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_off00009ba0.bin
26db6f40dd2b9fe69723f2521b99d1c7cab684078913bbddefb0e1f99da5e7f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA0 4892 bytes
font_01_sfnt_off0000ac34.bin
6eeed2463b8426b3df6fbf96eb5e36c64602934efe72ab9eb2ef63f9df8718ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC34 10392 bytes