Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ee6013b178da53…

MALICIOUS

PDF

45.7 KB Created: 2020-08-19 00:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9733878e3627bf5a244e08e9715f32a4 SHA-1: 6d9d170082fe3b7e12ac0fe1ee5047b5fa595d8a SHA-256: 12ee6013b178da53756bd98f80cdddd8df8181a8d44093491fb7b77309464140
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=dna+ka+full+form+kya+hoti+hai'. The ML classifier also strongly indicated maliciousness. The document body contains a seemingly unrelated question, likely a lure to encourage clicks on the embedded links.

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=dna+ka+full+form+kya+hoti+hai
    • http://files.therestthatworks.com/uploads/1/3/2/6/132682070/e282b53.pdf
    • http://sixelijis.tropicalswims.com/uploads/1/3/0/9/130969341/967881.pdf
    • http://sizako.silkwoodart.com/uploads/1/3/1/4/131437657/jisabawexorege-tobegidawapuz.pdf
    • http://gagejo.northlinefarms.com/uploads/1/3/1/3/131383483/gekogobizudepup_sakemabotiv_tesuja_pifulirubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/nsfw_discord_emojis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/departmental_accounting_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/god_stories_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/xakivezekewagogunavuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/vovotezefaxajoxelizur.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/kunikufufamemomulegerupu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/jitbit_macro_recorder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d16.bin
8a38512b57699a379bdd7df0ee889ce123a8fdecf36e79a2c055fc0b1a11af7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 4996 bytes
font_01_sfnt_off00006df6.bin
f3311663194904ed627225204e8427c368d660f25551f669fd263cfe4f30f96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 9496 bytes
font_02_sfnt_off00008ea5.bin
cf73619e7a0cbec96f5d9437ff0be6b712d86ca7c15bf4d6630aeb0240c1b3ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA5 8436 bytes

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