Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1c9948f96123dd…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 14:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37bedafa57927583a59e91be2ee804c6 SHA-1: b26bccfcbb98344490c0d8e4d5ecfd5bf5b87439 SHA-256: 3d1c9948f96123dd1c95a3cf46274c23691d2c6657d10e58f4f3dc42c58df1f4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a "burrraahh punjabi full movie free hd". The PDF also contains a mass external PDF link farm, with many links pointing to shopify.com, likely for SEO manipulation to increase visibility of the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=burrraahh+punjabi+full+movie+free++hd
    • http://files.trinitychapelwv.org/uploads/1/3/1/3/131383848/fimuguripob.pdf
    • http://vuwor.genesistimetobegin.com/uploads/1/3/1/6/131606490/7089154.pdf
    • http://files.teamfloridahoops.com/uploads/1/3/2/6/132695408/xexutozanu-donolixidiwed-numuguzo.pdf
    • http://files.unityhome.org/uploads/1/3/0/7/130740112/tabixugosuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7723/1007/files/devekesavalodozofolebale.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/venukedajizowagamipawetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5021/files/interlinear_bible_hebrew_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/sukala.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/epistaxis_otorrinolaringologia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/30955534728.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/free_pokemon_go_coins_no_survey.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/sukiwurunawalafinev.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/xokabizoboletisimor.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/zinojobefekeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/effects_of_stress_essay.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_off00004bb6.bin
ab25cb74f7402f0b9cf1321bc21500779513042fb558a4dfaf7b88addce17e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB6 5228 bytes
font_01_sfnt_off00005d53.bin
620a0e41eb5b8b0cbeec34417df253cfec44d57f8eae31d644574b120152d747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 9416 bytes
font_02_sfnt_off00007da7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 4324 bytes

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