Malicious PDF — malware analysis report

Static analysis result for SHA-256 405e6cdada9af17d…

MALICIOUS

PDF

97.8 KB Created: 2020-08-30 18:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23b235b0328155c438d61b082aedb96a SHA-1: b653570c01aa27161a4722a6c16d8dc6aa4fced2 SHA-256: 405e6cdada9af17dd187f51da29319d8bfa56a7faad0676b84651107654a4026
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a free movie download. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same lure text and URL. The presence of a link farm suggests an attempt to manipulate search engine results for malicious purposes.

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=free+download+the+movie+spiderman+ho
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/suwilofawetedonuvij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/d_j_ki_full_form_kya_hai.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/luser.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/nojerivewezimaxaxira.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4e60a866d5641c7a107ae86a43722e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a810709831414e44b54ec4ab61bb855e.pdf
    • https://static.usrfiles.com/ugd/93c935_b506269b2cf04530a07d7dcc0d63602e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/gikuxinimanuweled.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/acuerdos_de_basilea_i.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/gail_howard_lottery_master_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/arteriovenous_malformation_avm_adalah.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_off000142fc.bin
b5a8f414d3c8c03a3c32e109c096dcd83aa768d3994c983fe98cfbbb903eed28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142FC 5308 bytes
font_01_sfnt_off000154ef.bin
ed0f6761d1dbfe0d5abd26900dc687994805e6426a1770cae6cd3d59f184dfb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154EF 10976 bytes

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