Malicious PDF — malware analysis report

Static analysis result for SHA-256 831f2f04fb40a627…

MALICIOUS

PDF

42.0 KB Created: 2020-09-06 12:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aea363e77994f14251c5fa37be6bded SHA-1: a789e3657714692333816eea98357db873ad9325 SHA-256: 831f2f04fb40a627c57479fa86798286d197334d257e92aa291ea7db52e9c70d
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'ttraff.me'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, likely for SEO manipulation or to obscure malicious activity. The presence of a 'download button' lure further supports a phishing or social engineering attack. The document body contains obfuscated text and a URL that appears to be the same as the malicious redirector.

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.me/pify?keyword=watermark+pdf+pro
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/28245381110.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/list_of_baby_animals_names.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/91337921772.pdf
    • https://static.usrfiles.com/ugd/f4de5e_9669d64bcd6c4db3bbb7345f88566a8e.pdf
    • https://static.usrfiles.com/ugd/74a852_c569f78016aa4130b4ac839ecefc0777.pdf
    • https://static.usrfiles.com/ugd/70094d_106f146f50d246ff9315417b6ed292a1.pdf
    • https://static.usrfiles.com/ugd/2994dd_d575e7ab36944388add0abf0ec071fd6.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/shirley_temple_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/eyelander_killstreak_kit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/wevobuxejoxiju.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/samsung_beep_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/fodakun.pdf
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/33511714382.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/nikon_coolpix_p_610_manual.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_off000066ee.bin
45109afdd3d5fb5c9033e19c512b61d9727968af2e1e505927af66878f1b81e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EE 5052 bytes
font_01_sfnt_off0000781e.bin
327d556324520bc2330ac7b3dc20179348529ec4a11f302d388ac43944aa378a
pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 10296 bytes