Malicious PDF — malware analysis report

Static analysis result for SHA-256 71facd465e7fc0ca…

MALICIOUS

PDF

45.4 KB Created: 2020-08-26 06:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1705f77d8750604e767b6ceb387142a0 SHA-1: d7ce808f40d0de1789ba0fdc8b4ddc8fa2595dd0 SHA-256: 71facd465e7fc0ca5e28757f11e73eb9366693a1ed9ca919ae37fa5d51814937
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, suggesting the document is designed to lead users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Exemple devis site internet pdf', aligning with a lure for users seeking business-related documents.

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.ru/pify?keyword=exemple+devis+site+internet+pdf
    • http://files.theforestridge.org/uploads/1/3/1/4/131406535/4847def5.pdf
    • http://tamedero.glossarymagazine.com/uploads/1/3/1/4/131437914/wurijunumuxoja.pdf
    • http://poges.travelling4kids.com/uploads/1/3/1/6/131637254/3867272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/ruwusomusijotupoxesunalor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/fozede.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/blue_hawk_router_table.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/mavojororemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/bodoland_university_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/btc_first_semester_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/fundamentals_of_astrodynamics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/pobirewusafunogakofixojor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5326/files/milajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/starting_my_ust_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/gileradusorusaloridedipep.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/86682993001.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0e.bin
1dedeaae78c94afa98fdc940722b88a4c4429d19b65c87713b3bc6f583c1805c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 5060 bytes
font_01_sfnt_off00007043.bin
5a1945c355d7d79dde7b57c704a4dec23acf3bf6d6e1203ece63b1f70782bef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 10432 bytes
font_02_sfnt_off000093eb.bin
d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EB 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.