Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfe2027a510cb1e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 07:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f002d88381216e34fe6452a939924b SHA-1: 1376591891d82c51502539b298d606366e648ed8 SHA-256: 4cfe2027a510cb1e3655d59573759d5555ee514af96a9cf429d3b3fe257fae68
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing a large number of embedded URLs. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=roma+gezi+rehberi+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document's primary purpose appears to be to lure users into clicking these links, which likely lead to further malicious content or exploits.

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=roma+gezi+rehberi+pdf
    • https://cdn.shopify.com/s/files/1/0443/7049/3596/files/marriage_d_amour_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/40240793508.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/free_online_accessibility_checker.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/70549115225.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/mesotamikude.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/12th_class_sociology_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd8e3d9ad5a3470aa862d8405275c42c.pdf
    • https://static.usrfiles.com/ugd/8b97dd_2d819d49cc24417a8ad0457e03bba06a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5862d2c5c5884edd852281edacd75649.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6174b4b10694f6aaf6d5218462505bf.pdf
    • https://static.usrfiles.com/ugd/67e251_e16cbc24d5f745969c6d76799145dab9.pdf
    • https://static.usrfiles.com/ugd/5af86b_6ae79b2cc28c41fca5a7563c36ce803b.pdf
    • https://static.usrfiles.com/ugd/b8c837_49773783d9b1483f950c79338b3366ba.pdf
    • https://static.usrfiles.com/ugd/e745be_6066904cfc914d82a12bcb2228ca161d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8674ca55ab884b7881aba10e2e0f5705.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_off00006563.bin
83cb7396fc3bf53b1ee52d7865a9d54cc49c19791831ac73c85b30dd72bcd9d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5444 bytes
font_01_sfnt_off000077ca.bin
4bc9dd44d7cdbcd5cb7e5ead479b0fc47b6c553c1b53dfa8a2fb2207df029bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 11160 bytes