Malicious PDF — malware analysis report

Static analysis result for SHA-256 61192b580efef928…

MALICIOUS

PDF

54.5 KB Created: 2020-08-24 08:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f19af348dd03d7da574195b75df99db SHA-1: 38da7f177cb3cde2aa19491ab2a688cff71d55f0 SHA-256: 61192b580efef92845e48894ba85189a58f1aa216eed99b4d569f89077b6bcb8
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload or phishing page. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous Shopify-hosted PDF links, some marked as benign and others unknown, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ararara+khatarnak+song++pagalworld
    • http://files.rampcheckglobal.com/uploads/1/3/0/8/130874233/5165768.pdf
    • http://files.beaulieuparkmusic.co.uk/uploads/1/3/1/4/131438366/ec1e6.pdf
    • http://files.csusmaccountingsociety.com/uploads/1/3/2/3/132303264/siroz-rilawotumutix-sojugako-ribumutezefog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/8749/9157/files/parts_of_the_brain_and_their_functions_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6323/files/32914134298.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/87066059285.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/guterexiwobuvizewute.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/57876421694.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/miluvurasovodelifasuxesup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/gikojagetizumabireru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/supply_chain_management_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/70335548562.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/namepunamebixaj.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed6.bin
070b6c5eeee53cec5c267d9fa0d1722ace71c587f73f4a5a7e8d0e3c18bc5e48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 5368 bytes
font_01_sfnt_off00007116.bin
9f7349edb32d0f90a8c541cdc6e0b9c52f88478f38b61acafbc3296b7bd4ba05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 6580 bytes
font_02_sfnt_off000087d9.bin
ccc0a279024a5e1993275c2f2b8451d61924c789abb2a374d16eee875ef637a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 15112 bytes
font_03_sfnt_off0000b746.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB746 16144 bytes

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