Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bcc7a9e787f410…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 21:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5f0f1dcc191ddcb54242bb7c3c672ef SHA-1: d684998a96fafc8dc8845dbf34c00009f8a698cc SHA-256: e2bcc7a9e787f4101095dca8822ab36948b7875d7d2dd3097d6efb5a11bfb3a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting benign PDFs, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique designed to lure users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirection.

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=paradise+lost+by+john+milton+summary+and+analysis+pdf
    • http://butavereb.ucandles.com/uploads/1/3/2/7/132712358/kasonefojegil.pdf
    • http://files.newellbooks.com/uploads/1/3/0/8/130813797/vapujulo_rajeker_vewidufe.pdf
    • http://files.happilyevershapiro.com/uploads/1/3/1/4/131453061/dopimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/blends_and_digraphs.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/xazup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/auxetic_materials_functional_materials_and_structures_from_lateral_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/71063119636.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1707/files/goletijezebarunemaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/jiwivopavumubatusanugugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/779632952.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/1993_aashto_flexible_pavement_structural_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/29728192625.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/17920645591.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_off0000612b.bin
ed4e8b606f583f3ccffd06e930e20dee902280580c4bfd7fbde81b498ba54d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 5600 bytes
font_01_sfnt_off0000740c.bin
66cd5f5197193d7f5c745843f5affa7711b858be562a6ee02cafa010e02226aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x740C 9584 bytes