Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d882d0014139852…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 16:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084880cfc3be3015664c8b73001018be SHA-1: 930fe0b91ecd7673350d5fb51b38ec252dd11dba SHA-256: 8d882d0014139852e4b746b5f28727aee5def3d542172d1787b3af294fd2ec61
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary redirector URL being https://ttraff.cc/pify?keyword=delphi+greece+tour+guides. The ML classifier strongly supports the malicious nature of this document.

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/pify?keyword=delphi+greece+tour+guides
    • https://cdn.shopify.com/s/files/1/0432/4294/6715/files/kefasonazudakazulim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/7196396477.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/sixabovebanuxewu.pdf
    • https://cdn.shopify.com/s/files/1/0461/7705/8969/files/addition_math_sheets_for_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/baboganizivemelusiwidux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/murej.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/19850144756.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6048/files/the_road_to_unfreedom.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.pdf
    • https://static.usrfiles.com/ugd/9d66c7_fe1e44ca7cf04807b650d7aa975e62a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d9d6dc979fe4e8493946f2e5b0cc57e.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/bsc_physics_honours_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/niwofofejikekufilotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/30847626540.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_off00006049.bin
fd0c6cffee44384201833358338d9ed0669c07838139680051ce2d1a3bf21d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 5124 bytes
font_01_sfnt_off000071be.bin
094022ccd06043b7e5ec9e2161ccfdccca3c035df109fd6982eb159d0413cd26
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 10888 bytes