Malicious PDF — malware analysis report

Static analysis result for SHA-256 46af9efb0949540b…

MALICIOUS

PDF

47.2 KB Created: 2020-07-31 10:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d43386e4b170ac9b50d0c44ad26b51 SHA-1: f30439759b41260b5f0454656a947b13a2da95ce SHA-256: 46af9efb0949540bc1df9558d5c47eb0071fcd0e980db7a93f830fbbd7033f2b
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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on Shopify, suggesting an attempt to obscure the ultimate destination or distribute content widely. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and unreadable, but the presence of the 'jaundice in infants pdf' keyword in the malicious URL suggests a potential lure.

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=jaundice+in+infants+pdf
    • http://files.collegeclubofhartford.org/uploads/1/3/1/4/131483719/fomavigemega-filutunimatop-tedasivinavatu.pdf
    • http://files.nathalielacoste.com/uploads/1/3/2/6/132695805/3935982.pdf
    • http://files.chelseagiles-peacejournalism.com/uploads/1/3/1/4/131407178/tidav.pdf
    • http://files.alittlelively.com/uploads/1/3/2/6/132683154/de65e0cdbd396ea.pdf
    • http://files.kayliegroff.com/uploads/1/3/1/3/131384145/tikolepotufido.pdf
    • http://files.collegeclubofhartford.org/uploads/1/3/1/4/131483719/fomavigemega-filutunimatop-t
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/91980656492.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/pizadoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6257/4750/files/88956045008.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/rukobawebovakita.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/69332654426.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/tixusug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/tamugebedibiwewulevomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/buzegijunige.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/12501053144.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/45713985644.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d3d.bin
00b6e060985cde4403a8b306f0cbe6c670df9c70699b7c322a45d7e9bf317061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3D 4784 bytes
font_01_sfnt_off00008d8d.bin
cc287c96643249578bd627aec6d1ee150de8e39e2941e75a7f4d6f29a14d9335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 10112 bytes

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