Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca5227bae0b4830…

MALICIOUS

PDF

45.4 KB Created: 2020-08-13 21:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d83b47d5501618b79be5d13e48f81bd SHA-1: 0efba7a60c2619bfc9936523c10fc2138cc9525b SHA-256: 5ca5227bae0b483062c1f242f5b44a484b84fb3001f6129c1d8519a4aa18c6d4
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=chengalpattu+express+platform+number'. The document body, though heavily obfuscated, contains text related to train platforms and the authoring application, suggesting a lure to disguise the malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=chengalpattu+express+platform+number
    • http://files.padanijewelers.com/uploads/1/3/1/3/131384058/paponuzado.pdf
    • http://zewunide.bwellcolumbus.com/uploads/1/3/1/3/131380005/xuselojalusujev.pdf
    • http://files.andydoveyphotography.com/uploads/1/3/2/3/132302859/64cbeedb7f.pdf
    • http://kefevup.brandywayne.com/uploads/1/3/1/6/131606552/mofeguluf_wusemelig.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/30944434393.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/que_es_calidad_de_vida_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/wafavuxivevekovane.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/zikujidedoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/kolulanos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/99750993609.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/weweduzegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/quickbooks_online_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/78750883593.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/zireju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/20518079669.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_off0000622e.bin
249c697088b9b75bf3e9ad49d2af549cd68f4b638463c9658044d12a26e0a44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 5380 bytes
font_01_sfnt_off00007453.bin
9f4cf5f85d518ec62ed5753f0b8fae382badb2b0d75cf3cc29a573718796ec7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 11168 bytes
font_02_sfnt_off00009a70.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A70 4324 bytes

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