Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2693ef95096bafc…

MALICIOUS

PDF

45.0 KB Created: 2020-08-22 06:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 330d8ba081586ae27ce558d3b770e743 SHA-1: a35216a314c8117cd688947c757973c88f5435eb SHA-256: c2693ef95096bafc672d2eee69bf573508d09f7d8c5a29c63455a9d258130bea
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the intent is to drive traffic to potentially harmful content or further exploit.

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.ru/pify?keyword=tu+assumeras+tes+desirs+pdf
    • http://fuwinixu.parentsforeczemaresearch.com/uploads/1/3/1/3/131379578/xafosep.pdf
    • http://giwatiw.theaterdanceworkshop.org/uploads/1/3/2/6/132696323/magezarowiwel.pdf
    • http://povuketiw.myfourleggedstool.com/uploads/1/3/0/8/130874134/mozat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/90252105458.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/45242988209.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/jobekefurafedimowagab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/19556516227.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/bipegoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/didazaxakada.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/32401955677.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3517/files/gibowigitunisobules.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/metro_map_latest.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/seropikuselapotevisewi.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_off00006e1b.bin
afd3415e7a30ecc44bef574dfba6c87ace04b5665cf7c32d2c12af634b9d1adf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 5104 bytes
font_01_sfnt_off00007f5c.bin
487118972fd553362cef6a7d03047058fcd69dce9bcd3569d40244cc5e063ac3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5C 12464 bytes