Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e1ba20e310ad46…

MALICIOUS

PDF

61.7 KB Created: 2020-08-03 20:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d794c6a655edc6072170d35c5a7d0653 SHA-1: 021260cfe5968669cfe6bf6fbab647a1b0b38951 SHA-256: 16e1ba20e310ad46574f8762bc7fd4a284a14e14cc34e463ed5b04b75d7d08bd
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a bankruptcy act document. This indicates a phishing or scam attempt, likely to lead the user to a malicious site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bankruptcy+act+1997+pdf
    • http://files.olneyfarmersmarket.com/uploads/1/3/1/4/131406060/banuwev.pdf
    • http://files.rasaddleclublarkhill.com/uploads/1/3/1/3/131379540/613642.pdf
    • http://files.eighthelementllc.com/uploads/1/3/0/8/130813846/453fca.pdf
    • http://files.tuscanystudios.com/uploads/1/3/0/7/130740213/9143555.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/76060100600.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/15840859115.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/vowavutosale.pdf
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/david_deangelo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/60224026652.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/fijitevudofejanepivigetiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/19070058712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/20712844659.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/95567728040.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0436/5582/3525/files/96819910603.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_off0000a843.bin
82a8b7136b0ba84a1ea83d4cdbee93595592f37afc73e9b36ef2c7a22d2d3f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA843 5048 bytes
font_01_sfnt_off0000b992.bin
11d328a6c404d060d46ae8347650f3c199e826930fbd156b7bd6b50634ae62aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB992 9940 bytes
font_02_sfnt_off0000dbb1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 4324 bytes

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