Malicious PDF — malware analysis report

Static analysis result for SHA-256 756dd19239b032ba…

MALICIOUS

PDF

38.8 KB Created: 2020-08-08 20:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60daf07047431725cbc47e165910d74e SHA-1: 610d3becb3afd604551f9d0f8872c9fe700ebbb8 SHA-256: 756dd19239b032bab7c5e5fff761b66a780bfd5bd82159b31940072003777a37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm intended to distribute malicious content or traffic. No scripts were extracted, but the embedded URL is the main indicator of malicious intent.

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=direito+processual+civil+araken+de+assis+pdf
    • http://files.chicosierra.com/uploads/1/3/1/1/131164043/jajowawuvur_wupisok_zonuxapuxo_lexezegusibaju.pdf
    • http://files.douglaspharmachems.com/uploads/1/3/1/3/131398428/dosibasegipekugukiv.pdf
    • http://files.sathiavanee-veeramoothoo.com/uploads/1/3/1/8/131871891/jidutemepupaz.pdf
    • http://files.i4ingenuity.co.uk/uploads/1/3/1/1/131164531/a117ab0a5ae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/kabesuvutokukekevufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/weblogic_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/multilingualism_advantages.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/99085248924.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/zogesegirexibonazewipama.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/administrative_law_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/zowizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/accounting_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3453/2245/files/21031845464.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/zejifasikoxuwisigezodu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9170/files/94923423664.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/93513694004.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/6551998896.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_off0000543a.bin
d0c002d1760d8cf021a2873d4546839f3cebaddb1368a99f8183fede9332821a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x543A 5272 bytes
font_01_sfnt_off00006643.bin
e1ef4a2ff532c7522db00966472a2482b5226a396fe5f61d8edce5f5a3acf699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 12928 bytes

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