Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc26d554086a8d17…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 16:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05749ce26d667893d303fdf958de0418 SHA-1: 72b0d245b08b2bfb632ca62c02039912f0b6efdb SHA-256: cc26d554086a8d1771431d629119af22bfc94f97bb203ca6dcde536f264b90d8
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL suggests the primary intent is to lure the user to a harmful external resource.

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=workforce+thd550+owners+manual
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/paint_shop_pro_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/31841992921.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/befoxej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/bojerif.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/ashokan_farewell_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/pes_2013_crek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0464/7229/8646/files/83935068268.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/45223556188.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/sewizekajin.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/bed_bath_and_beyond_sheets_nz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/84557191028.pdf
    • https://cdn.shopify.com/s/files/1/0432/8944/4510/files/fijikovizewit.pdf
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/microsoft_word_cover_page_templates_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/92475203892.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/fugikowobimozulevutu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004df6.bin
3e94f67e45bcd9b546e58d78203c90b171586bee32fa6fe5a36403a20330677e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF6 5528 bytes
font_01_sfnt_off000060b2.bin
03b4287dcbef5b2ce6069c38489c52dbf877a58387dc3be5be277eb80864a16c
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 10076 bytes
font_02_sfnt_off0000833d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x833D 4324 bytes