Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbc5f8c58a0f0fe…

MALICIOUS

PDF

37.7 KB Created: 2020-08-30 21:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f55f38d4a10b1eb8405ce454e5f978a4 SHA-1: 74c7900fc9dfb71b7abcff909304fe8664bb3713 SHA-256: 3bbc5f8c58a0f0feddc8530173cbc4703b9d9d68b73ab975a8d8ef97394e916e
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL `https://ttraff.me/wix?keyword=alacakaranl%25C4%25B1k+5+%25C5%259Fafak+vakti+3` is the primary indicator of malicious intent. The document also contains a large number of external links, suggesting a link farm, with one pointing to `https://static.usrfiles.com/ugd/9219f8_e64438b57b7a4ed1a01ed438584dc474.pdf`.

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.me/wix?keyword=alacakaranl%25C4%25B1k+5+%25C5%259Fafak+vakti+3
    • https://static.usrfiles.com/ugd/9219f8_e64438b57b7a4ed1a01ed438584dc474.pdf
    • https://static.usrfiles.com/ugd/76b6de_b77460f7424c4c1c9a04a76c49571ff8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ffec7ef8bf841e1aef717cf53b69edb.pdf
    • https://static.usrfiles.com/ugd/b8c837_65242c9da00b488a82eb34ecaf09c1ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_411da9f96bd64d42b5d9faf7ff2e1b4c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/oraciones_subordinadas_resueltas_1_b.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/48544221181.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/tabixixutugizel.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/21216940273.pdf
    • https://cdn.shopify.com/s/files/1/0450/5387/0232/files/bjt_and_fet_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/92343391463.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/19293000047.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/suxitokude.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.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_off0000516a.bin
583b0922649a1d9f1c0f6a5f97e48c5bebd645a588484b56331ec5455f4df4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x516A 5376 bytes
font_01_sfnt_off000063c7.bin
76c71091a9c8427b39f8e61761c910e5806b6ce6cf76c71bf43407d0f9d9ffe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 11724 bytes