Malicious PDF — malware analysis report

Static analysis result for SHA-256 76105ab3556c7480…

MALICIOUS

PDF

57.1 KB Created: 2020-08-05 11:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a20c5d181740d9661a1fcf43b438204 SHA-1: d81a74f776fa20540a1ea2f4b029525e8088ccc9 SHA-256: 76105ab3556c74808949e357052df6875bd4e5473f96b1dbb23de3edb1f389c4
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into downloading a file. The presence of multiple Shopify URLs, some marked as benign, indicates a link farm strategy. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malicious download attempt.

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=important+days+and+themes+2020+pdf+download
    • http://files.firstireton.com/uploads/1/3/1/3/131383982/f5f4dbf9.pdf
    • http://files.slocampnpack.com/uploads/1/3/0/7/130776401/jofagupasob-sajajopaban.pdf
    • http://files.purplestottltd.co.uk/uploads/1/3/2/7/132741334/rigipojijiwizafes.pdf
    • http://files.ajmagic.com/uploads/1/3/1/4/131438142/bawetofekafudalek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/35502148597.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/95954708336.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/8431356701.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/zezenawutasifafagezumaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/xetuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/40728368301.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/63900817757.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/44238867033.pdf
    • https://cdn.shopify.com/s/files/1/0431/6774/4160/files/lozure.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/milodaporugorupofaxuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/pijimijajivame.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/kawasaki_zzr600_workshop_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/73587631481.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f10.bin
82c2209e8437a0f1548e191e4999e348493215b055969e81f9ef4f1c9fc2b763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F10 5684 bytes
font_01_sfnt_off0000b259.bin
03322ecf900bceb504ff3aeb6f5d856f7c57be7d825f7a17ec6e8b3e5334adab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 10664 bytes

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