Malicious PDF — malware analysis report

Static analysis result for SHA-256 e362fcad78b1a2fd…

MALICIOUS

PDF

35.9 KB Created: 2020-08-03 08:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ecaf49162c94909b9ae0bba13cea4d2 SHA-1: 767559add8126b24ad001268a6d49b8c68fc1526 SHA-256: e362fcad78b1a2fda5220c66b1199c3279e2b6e7cf53e8c7c7a754d584598d1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Ups store valdosta ga' and the malicious redirector URL, suggesting a phishing lure.

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=ups+store+valdosta+ga
    • http://narulufi.rebelcruzers.com/uploads/1/3/0/7/130739309/efd51f1f459300.pdf
    • http://files.brianskitchens.co.uk/uploads/1/3/1/3/131398374/dogamed-rarimitas-fedobapazesilox.pdf
    • http://files.murliesmiraclegrowth.com/uploads/1/3/0/8/130813961/10be787.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/25143524043.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/waxuvatalaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/56992383773.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/jikexojovuzubo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/44449291650.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/jofapagazefimovusuvopovuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/1935668716.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/yard_machine_lawn_mower_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/97537377566.pdf
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/century_16_greenback.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/30285175225.pdf
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/70940459017.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e47.bin
5bf81549346c70bd45c1063de877190c8731b5e826f486f63004bb022e2075a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E47 5180 bytes
font_01_sfnt_off00005ff9.bin
f18dad954a54439d9d799312097e573de384c26393b172bb4a7d0312109e3b7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 10180 bytes