Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e83f5c761408689…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 14:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08a3e30c4b22c0b4ab1016be7907e9b6 SHA-1: 0f8698852266f2fea0feeb25ba0d0f75d44540d3 SHA-256: 2e83f5c76140868941ab7f656c6417bb56cad793debad660dde848b99f1adf8f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=saints+row+2+xbox+360+cheats, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference game cheats, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links hosted on Shopify and static hosting sites indicates a link farm strategy, likely to improve SEO for the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=saints+row+2+xbox+360+cheats
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/molatulavuwuvuduxuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/palmistry_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/jaloponejuwupizovadopawox.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/25998474360.pdf
    • https://cdn.shopify.com/s/files/1/0438/2221/9421/files/fasejaxagomeve.pdf
    • https://static.usrfiles.com/ugd/f63f29_aa0f5a506c964c29a8023cb2017ca54e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d5fbe06370441259d6897b82947527c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4ba40b1a6b4112bf25479cba565d0e.pdf
    • https://cdn.shopify.com/s/files/1/0463/5361/2957/files/zoronigarakexebalamitepob.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/micro_sd_64gb_samsung_o_sandisk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/puwefejixer.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/64170952394.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/free_wedding_border_templates_for_microsoft_word.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_off0000608a.bin
661bf1efd80c59661ffe580c37c80d198fbe2b3be532d33112270a58aaef3817
pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 5852 bytes
font_01_sfnt_off00007470.bin
8dd8e3fbf8674eb57feaa4bd0b406c47e3be8d1f681c09cbc6210aad9e6a2726
pdf-font-stream PDF embedded font (sfnt) at offset 0x7470 10632 bytes