Malicious PDF — malware analysis report

Static analysis result for SHA-256 326109edebd76831…

MALICIOUS

PDF

36.4 KB Created: 2020-07-31 23:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d44a93cf5d9a2038e01591ba699970f9 SHA-1: bcdc96c60fc2d32d26d8cef655141ee2cc4167f6 SHA-256: 326109edebd76831397eb0502eb34f55639ace2ee3375e131229730d4b799cf3
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=psp+wifi+not+supported'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to Wi-Fi issues. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=psp+wifi+not+supported
    • http://files.malianmanuscriptfoundation.org/uploads/1/3/2/6/132680808/ffa7152559d284c.pdf
    • http://files.visualpoetrybygina.com/uploads/1/3/1/3/131382808/6f7aef61.pdf
    • http://files.sterlingartsanddesign.com/uploads/1/3/0/9/130969428/ef56ca90f8.pdf
    • http://files.nrchemistry.com/uploads/1/3/2/6/132681783/diloxevixofije_vusaxuletazez.pdf
    • http://files.starhuson.com/uploads/1/3/1/3/131380992/lajedanepafifusodad.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/56330186825.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/65480577949.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/66190123428.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/5238592898.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/zenipuruvak.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/kipudanijupezuwazibeweta.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/dixegilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/befexedubefewon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/gaxexale.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/11508398073.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/395654762.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_off00004f61.bin
35863e8e2dc9755e78e5212edc20cba61f08b91602e69a0f48324400bc4236c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F61 4888 bytes
font_01_sfnt_off00006029.bin
8afc5c6b084c1a73e5406d17e20288a4b967df7008f6fe8b0606d7ef0fde796f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 10204 bytes

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