Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac16ca9b8a4245f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-01 16:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f99514692c1a6c573c156ec7b30b78 SHA-1: 6cd30159328b6057f24efe17c1c131175c5f6689 SHA-256: 6ac16ca9b8a4245f6d1bcfc6b5003e8445fa7ce1483b3d810e2d734ab8145d61
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.com/pify?keyword=coleman+powermate+1850', is flagged as a malicious redirector. This suggests the document is designed to act as a link farm, potentially for SEO manipulation or to redirect users to malicious sites. The ML classifier also 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=coleman+powermate+1850
    • http://files.playwithfireproductions.com/uploads/1/3/2/7/132740685/nuvato.pdf
    • http://files.soulshineyoga.ca/uploads/1/3/0/9/130969751/5e7a69ec1cca02.pdf
    • http://files.tldsgn.com/uploads/1/3/0/8/130874369/kosajesijimim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/20147065535.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/naguxatuzibobetot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/donapepem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/58130630942.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/6904663992.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8922/files/life_in_mono.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/norirowipuninuxomesuxuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/66362360047.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/48437021101.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/jobidukikuwepabaxozafofas.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/80262147874.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/tatobujotujawife.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/rufexorubukazo.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_off00004c2a.bin
85fb06c38875585d77e4f1c548fce8059ca4c4bef580278076848f504a3d9cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2A 5296 bytes
font_01_sfnt_off00005e24.bin
526e1a4cb9487054f7c5c46a2b5a76e8fab03a9ef2ec94fc522163cd1f0eda62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E24 9588 bytes