Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dab1bf8da3d6026…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 19:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8553969d86a226463390594c86f165cf SHA-1: 393d78730a1ac146538968ca14168237a5e030e0 SHA-256: 0dab1bf8da3d60268f87cc15f12394add6ad0818ad64e6a33fef698993c4b1fc
162 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Adobe Photoshop CS2 free download' and a URL that appears to be part of a link farm designed for SEO manipulation. The presence of a malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt, likely using the lure of free software to entice users to click through to malicious sites.

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.cc/wix?keyword=adobe+photoshop+cs2+free+download+po
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a422e836c42a4d85b8a812df5422cc6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cdd7914f6664c0fb4f3b3874868d185.pdf
    • https://static.usrfiles.com/ugd/269bb8_eb5703c201b540c9bdff671db0fc6c93.pdf
    • https://static.usrfiles.com/ugd/b8c837_6107227752f744bc9b6093a3d5bc7f42.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/mudoka.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/miseruludure.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/54372298665.pdf
    • https://cdn.shopify.com/s/files/1/0436/5982/1209/files/napapufurakezar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/cardinal_numbers_esl.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/gibavojamuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/cinta_rahasia_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/xopipemumivoganukolojuti.pdf
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/44064180199.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_off00006348.bin
545d9aa79910e0c3f2f34ff4a2cbb9796d81cb5cc6cceb44c167b725abb93f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5596 bytes
font_01_sfnt_off0000765e.bin
acef5e582f1e8ca5491c27db496e56fd19719789ef243a525b7ef6114c747fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 10480 bytes

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