Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7ca019948c480d…

MALICIOUS

PDF

35.2 KB Created: 2020-08-08 21:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9fd48cfadb7b4fd05302d900fc9d105 SHA-1: 20f4d56863241a0432d6685d40de20ad2bbf2622 SHA-256: 4d7ca019948c480d3198d485d10aeb4979bf7c337e422d6e89196c0249758674
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', suggest an attempt to lure users to potentially harmful content. The document body, though partially corrupted, contains references to these URLs, reinforcing the malicious intent. No scripts were extracted, limiting the analysis to the document's structure and embedded links.

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=sns+pneumatic+cylinder+pdf
    • http://files.leguesepticservices.com/uploads/1/3/1/4/131453350/dutigalor.pdf
    • http://files.acetresearch.org/uploads/1/3/1/4/131438234/totajotovuwij_gebigojadez_zedawuzis.pdf
    • http://files.johnnyaircargopadala.com/uploads/1/3/1/8/131856949/xaxezefozesepos-libuxanowes-divuwelotekedup.pdf
    • http://sinon.lvpoutlet.com/uploads/1/3/1/6/131606552/8671634.pdf
    • http://files.jeffreymorabito.com/uploads/1/3/0/9/130969312/4902307.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/fluke_754_documenting_process_calibrator.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/51128412263.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/gijoxit.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7191/files/winchester_model_12_value.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/vapakugabotojupipesalugor.pdf
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/complicaciones_de_absceso_pulmonar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/managerial_accounting_garrison_14th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/womudejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/2487737745.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/xerunabos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/list_of_commonly_used_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/39037887247.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/blue_bells_of_scotland_trombone_solo.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_off00004a3a.bin
331f4bdcefc749e848e8077c10e2ab352df16fef4c5f8a5badd9d300d0d7a06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3A 5508 bytes
font_01_sfnt_off00005ce0.bin
37f05ea6ebb698fafbfa6af1971f668ab28b23662b0be96651831335e4b93948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 10308 bytes

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