Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb02bfc6403fbe2…

MALICIOUS

PDF

48.8 KB Created: 2020-09-02 00:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f712ce62cc05551d806b2761880bbd SHA-1: 68fd347b0b81eb8dcd0c00a3628a42cbe16d2dfd SHA-256: 9bb02bfc6403fbe203cd7993f356695a432cb35a6e415ea4ccb6043d5fea8448
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. One of the embedded URLs, https://ttraff.ru/wix?keyword=android+activity+intent+filter+example, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure. No scripts were extracted, and the document body's content is largely unreadable binary data, making it difficult to determine the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=android+activity+intent+filter+example
    • https://static.usrfiles.com/ugd/1f5cef_b0d55b6e1fa54925a42bcb1f65095da2.pdf
    • https://static.usrfiles.com/ugd/11f207_e8d915d60e3544f0a47b4fd56360eb56.pdf
    • https://static.usrfiles.com/ugd/760101_7e9d4ecdd90440f7986845efb9d06c32.pdf
    • https://static.usrfiles.com/ugd/e80f4c_ba1af1a47b8943688d435f800fff10ce.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/34738406748.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/quest_order_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/82465188735.pdf
    • https://static.usrfiles.com/ugd/a2d007_32ab7fec1a224e3ab24fd948091aae3d.pdf
    • https://static.usrfiles.com/ugd/01e791_ed92f5332ef346818013f45d95ea6a33.pdf
    • https://static.usrfiles.com/ugd/1479de_2112ace6baa54bfa8c6afcd628d255a6.pdf
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/electronic_devices_and_circuits_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/blender_animation_projects_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2956/1495/files/numbers_in_english_1_to_1000_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/53412782705.pdf
    • https://cdn.shopify.com/s/files/1/0458/6120/8217/files/86803458214.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fad.bin
34acde4f3a3cac59038eb0900ce7b6a0d97e30beb9125d218bdcb6c696d26f51
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 5340 bytes
font_01_sfnt_off000091dd.bin
5b408214960fc5153567ebb4aaa0952e3ecab5d4774d660daa58b9d8028cb81d
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 10700 bytes