Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7335daff604a2b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 12:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26a70e82adae8ede51a6290f0b4eb80 SHA-1: 9aab896352fe32bcdbe437955e00feffe9af3bde SHA-256: 0d7335daff604a2b1149006253dbb7d425312ab94180f4c68249adfae7d40832
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, specifically a URL related to a 'super mario 64 wad' keyword. The document also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various PDF files, some of which are hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=super+mario+64+wad
    • http://files.getfedconcepts.com/uploads/1/3/0/8/130874063/9931397.pdf
    • http://files.taycarpetinstall.com/uploads/1/3/0/9/130969742/6363042.pdf
    • http://files.waynepiersanti.com/uploads/1/3/1/3/131398338/lefavubukuzemadodogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/21709311845.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/55651465596.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/43361705575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/40178344140.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/zeretarefeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/kijalilunusurug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/here_comes_the_boom_nelly.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/gurutulosifinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/ramoruti.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/xigijosijuzigivizevixali.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/ruwumefobevumiritutipativ.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_off000057b6.bin
c471cd70ba13dc05f3374985bce832d6e1ccfc9e56b56ba76488fe31e4f325e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B6 5028 bytes
font_01_sfnt_off000068d9.bin
aea9478e40f1db3e9b64aff26c16bf02a9a8b222db1a7e15855c9552b8c7215c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D9 11092 bytes
font_02_sfnt_off00008cd5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD5 4324 bytes

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