Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8352a428b21834b…

MALICIOUS

PDF

31.1 KB Created: 2020-09-05 20:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81c795d91e0e8c2ac0bc27cdae274324 SHA-1: b79a74c02a77132eb3b4af838483f2db72218211 SHA-256: d8352a428b21834be00b8474beb9dd07a56edf094b338d4d5e2fe1b2cc49f5b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The embedded URL points to 'ttraff.club', which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm strategy. The primary malicious URL is likely used for phishing or to serve further malware.

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.club/wix?keyword=chutti+hr+song
    • https://cdn.shopify.com/s/files/1/0447/4391/7719/files/poxotogus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/53782401226.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/jalikinuroxoweseziguko.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/silent_letters_in_english_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/bixibene.pdf
    • https://cdn.shopify.com/s/files/1/0448/0906/0518/files/autocad_commands_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/81914567660.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/artificer_guide_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/63497820269.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/cdpq_annual_report_2019.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_b76f8cbb69cd4c8e87cac10bec18aec3.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_dd07e648efad4811805bd8a3d093d2d7.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_off00003f99.bin
76bd46279bcae015cf6d97f71d2e3f12b070838c80ec4a0e979f2114e4e423df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F99 4608 bytes
font_01_sfnt_off00004f3c.bin
a63a3785d7aa08a729890d3fcd25c47c9ddf0aed341d7c79d3306737e840a4db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3C 9732 bytes

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