Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fd2bf42f9d542c…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 13:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 531794febe67925083a7f98f745a5fd1 SHA-1: 66815e18544d6154b754a0089bb3721882952087 SHA-256: 14fd2bf42f9d542c76d382e332107eb4a44afafd67c27ab0258d711eb5687e2c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.cc/wix?keyword=2002+yamaha+big+bear+400+service+man`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, including `https://cdn.shopify.com/s/files/1/0431/6535/2102/files/mossberg_500_disassembly.pdf`. The document body, though partially corrupted, contains similar text and URLs, suggesting a coordinated effort to drive traffic to malicious sites.

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/wix?keyword=2002+yamaha+big+bear+400+service+man
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/mossberg_500_disassembly.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/37770644231.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/bajerelusojixemavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/81576095383.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/13509867069.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/palliative_care_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/bawawikef.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/jufugisubogijepakazaxap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/99582999558.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_off00005c1d.bin
4626ddc02ab73ba576eec1be798b64b49f65e9d86e32749f65ef5d4cc39daa2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1D 5348 bytes
font_01_sfnt_off00006e1f.bin
6873093e393e9b742b657d9328822df873412b2a03493d74cec46b9207bad811
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 13332 bytes
font_02_sfnt_off00009763.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9763 4324 bytes