Malicious PDF — malware analysis report

Static analysis result for SHA-256 4538f6df4bd4dc07…

MALICIOUS

PDF

39.0 KB Created: 2020-08-11 01:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a044366a2a5ade4a409a61dd60db216 SHA-1: 7346b8959ea3ded9fff9c6d378f9c783c859f8b2 SHA-256: 4538f6df4bd4dc0751f36109e2a0e13e5298497c2daec234a8052f50086d6a3b
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. The document body, though partially garbled, suggests a lure related to a 'joint venture agreement'. The presence of a 'visual download button' heuristic further supports a social engineering attack. The primary malicious URL is https://ttraff.ru/pify?keyword=cidb+joint+venture+agreement+pdf, which likely leads to further malicious content.

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.ru/pify?keyword=cidb+joint+venture+agreement+pdf
    • http://files.jasontakesphotos.com/uploads/1/3/2/6/132695432/4ae55068.pdf
    • http://tixifisa.100youthwhocarecentralyorkregion.com/uploads/1/3/2/6/132681352/tewirefowawofo-depuwipimagapa-kenidif-wesakoli.pdf
    • http://liwawa.tysonwestley.com/uploads/1/3/1/4/131454024/5866311.pdf
    • http://files.aresapparel.shop/uploads/1/3/1/4/131437074/8606731.pdf
    • http://files.borobot.org/uploads/1/3/1/4/131453432/6a2a3226a5e016.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/19198631587.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/70691176935.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/6563343398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wabodenerevugibew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/pejananexivimuviga.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/60721423685.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/73323545843.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/pelivavujasiferip.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/xudapel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/minecraft_pe_hunger_games.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_off00005949.bin
0de076b6f37f27923177c64b68708627ce942772ed38f75d21bb933e1e8f6888
pdf-font-stream PDF embedded font (sfnt) at offset 0x5949 5332 bytes
font_01_sfnt_off00006b5c.bin
c3aa615ced1e7ba478dba025fe7e364a0d05869430ac3e195750eef313962503
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 10564 bytes