Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b836fae00df90f4…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 19:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 190eb5f054722cfbb7e943cf965a0114 SHA-1: 7888fa8dd64113fa0d1358df6dce04a420e6a6de SHA-256: 8b836fae00df90f439b2eba92352bf7c45fd2bc4405256403195d345270d02e5
152 Risk Score

Malware Insights

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

The PDF file contains numerous links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. One prominent link redirects to a known malicious URL, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, includes text related to a bible commentary, likely a lure to entice users to click the embedded malicious link.

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=the+seventh-day+adventist+bible+commentary+vol.+1+genesis+to+deuteronomy+pdf
    • https://static.usrfiles.com/ugd/cc10e7_33f4fe9caf244ee5b95de3df3f9ac4aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_114e5d7d0dcc4541a4bc9ba8b55104f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a4a28552da14ee794c5e4c0b8485d81.pdf
    • https://static.usrfiles.com/ugd/b8c837_b505307334274776b85311ad1586d35a.pdf
    • https://static.usrfiles.com/ugd/ea78e0_26389728f4f4436dbe5210561cb50aa2.pdf
    • https://static.usrfiles.com/ugd/be19e1_031c401327534549bd9d8aa5f17ef82d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b6e61671bf14258ab38b24dae5e0cb3.pdf
    • https://static.usrfiles.com/ugd/36f25b_1239df5748bc49e0827026dde45b5d81.pdf
    • https://static.usrfiles.com/ugd/b5472a_de8b80923b354ce0953a089abeef60f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d6f1bd433a140919c808262f51d2089.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e5cc5025a64bebbebfacf31c504f08.pdf
    • https://static.usrfiles.com/ugd/b8c837_3419f3088ce24bba9636b245ef43c476.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/tidajoxuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tiluzarezowe.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_off00004e4e.bin
71fc449ca1520764da5225738ceeaabb637cbf861fdb58bc4cb257c7aea9946f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4E 5936 bytes
font_01_sfnt_off0000626b.bin
c638a6bf2f75c1bfa13b10e3d7247cfcf75adea7ea79f90612851ed3f0f4f6da
pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 10272 bytes