Malicious PDF — malware analysis report

Static analysis result for SHA-256 580efc5ce2ffb68b…

MALICIOUS

PDF

33.0 KB Created: 2020-08-31 02:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b7679197e09c86425e9d2ce40a447e5 SHA-1: 1b509671ed0fe4efeeec4a2ebaf13057e629ee90 SHA-256: 580efc5ce2ffb68b34302f335d22e2035e95d054146bf1fef487707350ebf16a
152 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as free downloads, ultimately redirecting to malicious infrastructure at ttraff.cc. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous links to external PDF files hosted on Shopify, likely for SEO manipulation. The primary malicious IOC is the redirector URL.

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.cc/wix?keyword=living+forward+pdf+free+download
    • https://cdn.shopify.com/s/files/1/0428/5091/0364/files/mugowug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/lemidosoravubopodifop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/lspdfr_agency_callouts_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/54064534476.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/96830487569.pdf
    • https://static.usrfiles.com/ugd/b8c837_98fe4ef2b21646f48007bab19c207499.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/fafurowonixu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/vabijinexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/97651371082.pdf
    • https://cdn.shopify.com/s/files/1/0464/6486/0318/files/184812457.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.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_off0000444e.bin
2af2783c64dddebd29942e1a39d90d99d231c661a507af9c0d891639b6f7008e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x444E 5124 bytes
font_01_sfnt_off000055e9.bin
55d14f15c535ac8c542cabb57f62271ac75cfa8954f8a8b439c320e7e0a10f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E9 9816 bytes

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