Malicious PDF — malware analysis report

Static analysis result for SHA-256 5045ef3ee92c2bdc…

MALICIOUS

PDF

47.1 KB Created: 2020-08-29 22:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef9f5539a74ea752fe3d6f789d2b6f79 SHA-1: 5491f8855838042faade9ec31b70a9a3d0b2da1b SHA-256: 5045ef3ee92c2bdca8581b519939988215c69c384899fb0180282545a7fa9f87
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though corrupted, contains text suggesting a lure related to 'Game of Thrones', and the PDF itself is flagged as a malicious redirector link and a link farm. The ML classifier also strongly indicated maliciousness.

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=game+of+thrones+1+sezon+4.+b%25C3%25B6l%25C3%25BCm
    • https://www.seyredelim.com/vi
    • https://static.usrfiles.com/ugd/b8c837_3ef7a20479ee44e0aed474771e6ac6f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_953e6decbe2a445cbfe6efe51b00db57.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/bokafoleferegogakedoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/27954571122.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d2897ec192445b2a6dcbf68e45d20ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b15643489db435c8438154b46b16337.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf34964ee53040f0ae4f55e428970441.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcbfd0dd84c46919f0b95b7516ae856.pdf
    • https://static.usrfiles.com/ugd/8127dd_20671357b1b345f689ac81806a09d3a9.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_0720b43dc7b04cabad2b9beda06b11ac.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_off00007663.bin
816928006b6b02925d958eb0919da332d87d64cd0400a5d6041c605868ff19aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7663 5660 bytes
font_01_sfnt_off0000891b.bin
b01393cbf0010b5a10c127bc6738381c2536c5955ffbdb1dd998b4e8158a9da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x891B 11844 bytes