Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6da2eec310cee9…

MALICIOUS

PDF

33.7 KB Created: 2020-08-07 03:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29dee88a776183bc6d8a8c3ffca8058a SHA-1: 35556d03ed004922b5569ef02d6217361cead357 SHA-256: fd6da2eec310cee9e0575f2faaf484fdd7741550250d7498e8ee922105295215
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the same URL and references to 'adobe photoshop cs3 tutorials in urdu pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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/pify?keyword=adobe+photoshop+cs3+tutorials+in+urdu+pdf
    • http://files.jellybeanschilddevelopmentcenter.com/uploads/1/3/1/6/131606854/a7fe9ceb24d.pdf
    • http://files.gazetteevents.com/uploads/1/3/1/3/131381544/vukubunoder.pdf
    • http://files.kidsquidstudios.com/uploads/1/3/1/4/131452794/jewutabune_kowido_xamafuvevasitaj.pdf
    • http://files.greenhillbowlsclub.com/uploads/1/3/1/0/131070186/subiminasirow_nigomevagituk.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/81628559526.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/65175510150.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/laluruzarunewasaxaroro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/totuvatenaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/powerpoint_presentation_design_tips.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/shaving_cream_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/hooked_nir_eyal.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/technical_drawing_architecture.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_off000046ec.bin
d93c7a1ac4b66b42961fddee8961e070fa4149206d2aa78407bd9a1a64ac24ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EC 5536 bytes
font_01_sfnt_off000059b0.bin
d5eee8968aef4b682dc2707dc1291e78a49608bff5eb21d90a83394540977742
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B0 9392 bytes