Malicious PDF — malware analysis report

Static analysis result for SHA-256 a269a2987d9ffe63…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 10:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7bec6f4c13237732f451f3747a63765 SHA-1: 4d99c37bc71e4d69bc4db38066ff1112edafba5d SHA-256: a269a2987d9ffe63950d24a22b7512870278d37542d3bd8af48c12378239fafa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=discovering+psychology+pdf, indicating a lure to download a PDF. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=discovering+psychology+pdf
    • http://files.societyofstbrigid.net/uploads/1/3/1/0/131070051/fezuduxo.pdf
    • http://files.katherinelmcneill.com/uploads/1/3/1/4/131453650/8609043.pdf
    • http://files.ithacahoneyworks.com/uploads/1/3/1/3/131383649/2509888.pdf
    • http://files.ourprimeproperty.org/uploads/1/3/0/9/130969809/4475911.pdf
    • http://files.broken-kingdom.com/uploads/1/3/1/3/131384098/7924505.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/madijitozajuzeduxikofito.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/57272432132.pdf
    • https://cdn.shopify.com/s/files/1/0437/6559/6321/files/85253846694.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/51998092614.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/sofilepegumozeroro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9230/3254/files/26877267348.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/12777305380.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/16911370910.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/juvafibidofakugenogute.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/zamajurakodurawufoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/46030740832.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.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_off00006dae.bin
15cbd020f4520b681fab4a1252e8caeb26de56cf431dcd9525805b576cf9bc7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAE 5368 bytes
font_01_sfnt_off00008006.bin
338e4c475dd437ceb58218eb6838fadb3211a2c59996a19bff3c0d269e108c55
pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 9948 bytes