Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3d2bb93f884046…

MALICIOUS

PDF

56.5 KB Created: 2020-08-02 21:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 883cc28cd83e89ec603765004b0fa35e SHA-1: 3790c4c92538fc1c00b91593f8641011ea8d45bc SHA-256: 6f3d2bb93f884046e71d0fee368c08fa56a1f1fc62c59e6ad7576573a3ec47c7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=john+deere+3800+psi+pressure+washer', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'John Deere 3800 psi pressure washer' and the URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness.

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=john+deere+3800+psi+pressure+washer
    • http://xutozixar.fourseasonsbuilders.biz/uploads/1/3/2/6/132696194/paduteturigupol_jexajinumojig.pdf
    • http://files.rhsesports1.org/uploads/1/3/0/9/130969960/zefuzebuxutese-tapavufosowuz-tugapiwat-gizekozabokesek.pdf
    • http://files.desmoinescommunityorchestra.org/uploads/1/3/1/3/131381679/xewenuzozuvobul.pdf
    • http://files.decor-boutique.co.uk/uploads/1/3/1/4/131408209/mimemano_filufuveluka_xonakosilew_libewuxasibafi.pdf
    • http://files.mobileweldingservice.co/uploads/1/3/0/7/130740522/c53351a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/20376435951.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/lazunexuveki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/magemumetusekorasojanugut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/85880433956.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/xewazosumuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/sapadofogodekutexuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/gogiwutotinakaduju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/62489692583.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/83991748470.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/nizazixasak.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/kekebopifexobazo.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_off0000852e.bin
508f95455e705903b3ae08674993e5f6751288defb64e7c5f1a908cac9f42475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852E 5400 bytes
font_01_sfnt_off00009778.bin
b2853f8b7e1e06cd98c319ec4ff161643183d61df8add54ad59e8b213e8ae4e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9778 15312 bytes
font_02_sfnt_off0000c6b4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B4 4324 bytes

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