Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28ada9f733e22c1…

MALICIOUS

PDF

55.0 KB Created: 2020-08-23 11:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74c835d76075c5edac2a7daf2e6e71e5 SHA-1: 769a713cd6de96bcfd60db184dabab2e54756f7f SHA-256: b28ada9f733e22c148b9b323eb45841ed1cec24526472c8181cc5282dd75768e
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, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure related to educational materials.

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/pify?keyword=tenses+worksheet+for+class+6+with+answers
    • http://lazeve.paranormalread.com/uploads/1/3/1/8/131856158/gosak.pdf
    • http://files.shiragirlschoir.org/uploads/1/3/2/6/132682048/zidol.pdf
    • http://mifajesun.naturallyliterate.org/uploads/1/3/1/3/131380600/fuxudeju_jagiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/wasanezilesovoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/96408056550.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/26898014345.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/89012742027.pdf
    • https://cdn.shopify.com/s/files/1/0438/3011/6509/files/platform_games_online_adventure.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/64838137158.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/baldi_basics_game.pdf
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/depression_screening_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/alliance_x_empire_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/31905796525.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/nadesofimikaber.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_off000082dd.bin
7d7de26f96191a424961e06a8bdd3aef415d40fd5d5f116dc3989080f164e3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 5016 bytes
font_01_sfnt_off000093ee.bin
2c437cfb7fbda85e04c9619f8ac06eb469e6c3d936542ee23d924e02cc5d6a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 14420 bytes
font_02_sfnt_off0000c0c7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C7 4324 bytes

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