Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca8f952f654ffce…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 16:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01872295ef231e1435d1cb8f14ded49a SHA-1: 363f93088dcff1c09cd3dc07ddb9fc3390737ca1 SHA-256: 0ca8f952f654ffceca2cbbbf5703707c175eba6642ae3c5d3d80276b7cf26523
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=dreamweaver+cs3+portable+portugues`. Additionally, it exhibits a PDF link farm with 16 external links, many hosted on Shopify, suggesting a tactic to distribute malicious content or SEO spam. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and link analysis indicate a malicious intent to redirect users.

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=dreamweaver+cs3+portable+portugues
    • http://files.europeanmarketandproduce.com/uploads/1/3/1/4/131453464/9006a064fba5c0.pdf
    • http://talefinij.sandiegobestpartyrentals.com/uploads/1/3/2/6/132695601/3c6d64b0752b7.pdf
    • http://mebuke.walnutstchurchofchrist.com/uploads/1/3/0/8/130814017/sogumoxu_fukapatuxopo_fanomudilifevo.pdf
    • http://files.jacquelinegreenough.com/uploads/1/3/1/3/131380225/gosogawavepex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/out_of_time_fallout_4.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/72632086941.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/advanced_excel_tutorial_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/bonfire_of_the_vanities_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/blood_angels_codex_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/99423204858.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/45257788655.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/8561336183.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/bozedikelegikuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/public_financial_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/eadgar_s_ruse_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/jovuzepolifusenatelifo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006422.bin
06bc0570ad84a3b3fb73126d8a006ba260458a41fbeea61a454c2e38e54250b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 5708 bytes
font_01_sfnt_off00007794.bin
782b2a386c2d2db9f0a8bc0eab601fabc3c26a1c42808756de45548f0c07d427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7794 11808 bytes

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