Malicious PDF — malware analysis report

Static analysis result for SHA-256 d835db9189b6ad2e…

MALICIOUS

PDF

50.7 KB Created: 2020-08-30 02:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d457633aad196ba186295821f025d810 SHA-1: 5915cc999d557efe4009963e227c5375d12ec014 SHA-256: d835db9189b6ad2eb0204a668850a894b5e43d9d856c448444eae43924c61e79
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com' with a query parameter suggesting a lure for 'strike back season 4 torrent'. This, combined with the PDF_MALICIOUS_REDIRECTOR_LINK heuristic, indicates a phishing or redirection attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document body and heuristics point to a malicious redirection strategy.

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.com/wix?keyword=strike+back+season+4+torrent
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/dad90e_84c5acc88eb847a08f1eb3c072499abc.pdf
    • https://static.usrfiles.com/ugd/865d50_01df6b075ccf44ab8e19a6ffee9dfa83.pdf
    • https://static.usrfiles.com/ugd/b8c837_7623674079ae4d38a386c18a331a61c8.pdf
    • https://static.usrfiles.com/ugd/c1de29_8502f958da1c4b8ebb2d292ca0a5a519.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b8570033c1c410996df5bb174229800.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c0452be10fc494bbbe4d85771ffaf5d.pdf
    • https://static.usrfiles.com/ugd/ea2f88_e35f554f27f84481b6d3acc1f341d5c7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/gy6_150cc_scooter_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/gofipobumenewo.pdf
    • https://static.usrfiles.com/ugd/99965f_1b9875b5b306476fa000d47637ba1b24.pdf
    • https://static.usrfiles.com/ugd/b8c837_19ee4eedaeb04954a20a3e07c9d8c732.pdf
    • https://static.usrfiles.com/ugd/b8c837_51e18f378204404bb747b8fc34048345.pdf
    • https://static.usrfiles.com/ugd/429b25_8849ae3afe2d4fd695ed7bd23c51b56d.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc5.bin
2b086199ec374976e0f8c5cec172c0f293ac3b12ed748de5ce2251a15610815e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 5156 bytes
font_01_sfnt_off0000714f.bin
e0770b72447bee5174c8991c75bf8663badc62c1f96bd41f913fce08dd24aa34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714F 2240 bytes
font_02_sfnt_off00007b69.bin
cdc79c7b9db8c5a013ca8ec129edaed11512c0742604a967116548ed232854bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B69 14024 bytes
font_03_sfnt_off0000a881.bin
e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA881 16168 bytes

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