Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d361b2bc86bcc9…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 14:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3727678cbbbb9de53f9c54c702f33eff SHA-1: aded5b242ffae23c0f187400579aa25ebcdcf5eb SHA-256: 95d361b2bc86bcc9a6820e4325433623d9e8da3ebdd24e3f506f506e54b90118
128 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, specifically 'https://ttraff.cc/pify?keyword=betheme+stylesheet+is+missing'. This indicates a social engineering attempt to trick the user into clicking the link, likely to download further malware or redirect to a phishing site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic.

Heuristics 4

  • 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
  • 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/pify?keyword=betheme+stylesheet+is+missing
    • http://garer.theatmpro.com/uploads/1/3/1/3/131398455/zonopobozo.pdf
    • http://files.amybloustinecoaching.com/uploads/1/3/2/6/132695575/0c9a7d9b.pdf
    • http://ronatuj.meganlamart.com/uploads/1/3/2/6/132681352/695046.pdf
    • http://jururagoz.kevinwiczer-actingcoach.com/uploads/1/3/1/4/131483152/4543375.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/java_postfix_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/xumumuzawew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/sujoxenomofetirijub.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/bokinonebev.pdf
    • https://cdn.shopify.com/s/files/1/0438/9735/6443/files/john_deere_8350_grain_drill_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/lahore_chamber_of_commerce_membership_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/numerologia_tantrica.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/pusozatesiwezoberasa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/sasubiparuzukotobovuwepum.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_off0000617c.bin
bcbb4a673f60da90f7880b445e7608b94253c69f84aba0ae8ea32c656e0888c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 4944 bytes
font_01_sfnt_off00007240.bin
deae1c20d8f65c3a2b1059b25bcbed4324d17cc3b3b03d67a49b4894d55bb9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7240 9792 bytes

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