Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2940cc2c9d2334…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 02:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c96c550c0e56a5c0ab70a4ef97975ff2 SHA-1: df3959ef308e30ab8bea5f4dec576aae9acee296 SHA-256: ab2940cc2c9d2334ea7633797f074144c7273da19dda5a0d49a04233e8a0596e
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on static.usrfiles.com, suggesting a link farm. The ML classifier strongly indicated maliciousness. The embedded URL 'https://ttraff.ru/wix?keyword=metroid+prime+missable+scans' is the primary indicator of malicious intent, likely serving as a lure or redirector.

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.ru/wix?keyword=metroid+prime+missable+scans
    • https://static.usrfiles.com/ugd/a107db_83f4a20f1ea9453d89318c4d1c4aff0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_01f2fd2444b2434586ba0b0969919ead.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3fa47637e54e7f874f5f0f9805d6ec.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/autocad_export.pdf
    • https://static.usrfiles.com/ugd/a467d2_79f9c5d627d64b76ba628c5cbfcb335f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35a52cb868b4ccfbcf705065ad8575a.pdf
    • https://cdn.shopify.com/s/files/1/0438/3332/7776/files/mk4_golf_bentley_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/16780354316.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/linear_functions_worksheet_kuta_software.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_off00006b99.bin
19057c7c77011f7eb33133b14997547e48a9de3c1418ccbca435d6f1b122ca05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 5364 bytes
font_01_sfnt_off00007dbf.bin
85690057395575bd95b8c07a82865be5a836f7449cb9345c898832b2c8569a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 10612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.