Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c58c1abe564382…

MALICIOUS

PDF

68.6 KB Created: 2020-08-24 18:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b40491a23558d1f1445a7f76f28fa0c3 SHA-1: 117e8320ae497b241fc2a8b018627750d6b97f21 SHA-256: 99c58c1abe5643822aa81793eb7c1b299df63f3cf552137cf88c3e2dae9f88c5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL 'https://ttraff.com/pify?keyword=parent+functions+and+transformations+calculator', suggesting a lure to a phishing or malware distribution site. The presence of a PDF link farm further supports the malicious intent.

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.
  • 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.
  • 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=parent+functions+and+transformations+calculator
    • http://files.castleislandcamps.com/uploads/1/3/0/8/130814784/230282.pdf
    • http://files.slgsponsorship.com/uploads/1/3/0/8/130814192/8a1a4ec04da4e.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.jericosoundsystems.com/uploads/1/3/0/7/130739405/dinejuwigakuji.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/21172727055.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/mm_dd_yyyy_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/reduce_file_size_using_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/dwarf_fortress_flux_stone.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/laser_rifle_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/wepadanafanufojon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/in_dreams_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/94154855799.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/jiritanokujafapoxuxisuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/70392495597.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/eduardo_galeano_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/39880218696.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/17978123093.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/sebeneji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b64e.bin
ad7bdb952bfecc5d632afaa85c25da44a4e299e47b70ecd0dab55e710016a456
pdf-font-stream PDF embedded font (sfnt) at offset 0xB64E 5048 bytes
font_01_sfnt_off0000c754.bin
5382a884e18b62a418480a11c47ff0ccbf4a499f7a6869952b8b2d5958eac9a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC754 15136 bytes
font_02_sfnt_off0000f69c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 4324 bytes