Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7120c432d76d0e0…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 16:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0d2e0f22ee64cc1eabed660039cd45 SHA-1: 7e3826286d10ca0a5efccc805e4817ca409a3078 SHA-256: a7120c432d76d0e0b28f6f6442323bd03fc73243ea2f97136a236a816b319199
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically the URL https://gettraff.ru/strik?keyword=job+shop+london+ky+phone+number. The document body, though heavily obfuscated, appears to contain this URL and other benign-looking URLs, suggesting a lure to a malicious site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=job+shop+london+ky+phone+number
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/8209595.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/wuzugozavesijap-xukurejijulute-rixasox-bumisewos.pdf
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f8ffc37844f7.pdf
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8725987d141.pdf
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/4442999.pdf
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f988fc56bb10.pdf
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/9026975.pdf
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/mafebetaxujewu-vomiwapudapep-lezup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetare/mapuwe.pdf
    • https://s3.amazonaws.com/nuxulikiwab/aaron_copland_what_to_listen_for_in_music.pdf
    • https://uploads.strikinglycdn.com/files/c44659b4-c224-494a-8bbd-1d87eed89293/96544875569.pdf
    • https://uploads.strikinglycdn.com/files/1340d981-8bb0-4625-80dc-83a4858ae5e8/ghost_rider_2_hindi_dubbed_full_movi.pdf
    • https://uploads.strikinglycdn.com/files/0811012f-b96e-43ff-b55d-f5e0ed811c70/90713621752.pdf
    • https://s3.amazonaws.com/bubodeliza/a_season_in_hell_arthur_rimbaud.pdf
    • https://s3.amazonaws.com/bajapovogam/45744204814.pdf
    • https://s3.amazonaws.com/gupuso/505343213.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078fc.bin
0afb7930e3cb5fcb032b4bfdbb68a2190664d5e8ea7cdc925a5a5c2f90b9b1a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FC 5284 bytes
font_01_sfnt_off00008acd.bin
1baed4f9e65339046400559518931527371a70ed9ae02a94fb577ce71bda97ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 10616 bytes