Malicious PDF — malware analysis report

Static analysis result for SHA-256 40464080a1294424…

MALICIOUS

PDF

49.8 KB Created: 2020-08-17 00:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3de7ac6dc0d0cd8b1366200e5f402ed SHA-1: d5fbb010b8a9969dd5cf9077f5f471879d37dd90 SHA-256: 40464080a129442465e04d7c7fdc3d83cae19f303c87feac61c50f321635c61f
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to potentially malicious redirectors like 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of links to known malicious infrastructure.

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=electronics+projects+ideas+for+engineering+students+pdf
    • http://jefafiv.bucklesrvsales.com/uploads/1/3/1/3/131398140/69a7c450ae.pdf
    • http://files.oakland-baptistchurch.com/uploads/1/3/1/0/131070633/kumegodejevofofivu.pdf
    • http://powiga.cuttyantiques.com/uploads/1/3/1/3/131380005/rumazoratejerezek.pdf
    • http://rororiru.olgacironis.com/uploads/1/3/2/3/132303382/rofab_xefaxawitofu.pdf
    • http://files.danvilletrikappa.org/uploads/1/3/0/8/130874067/cba5cd008.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/tussendoelen_gevorderde_geletterdheid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/install_redis_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/concepts_of_genetics_11th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/koretimekuser.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1701/files/nizavewerawitet.pdf
    • https://cdn.shopify.com/s/files/1/0455/8025/5397/files/34438192932.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6716/files/sacramento_da_comunho_cifra.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/starbucks_barista_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/51868605897.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_off00008540.bin
534cadfa47b508800caf67aea2c0768ba6d70f99c64e3721e0927dd1ef01ba85
pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 5356 bytes
font_01_sfnt_off00009788.bin
4d56997dae17f7926ea1c64ceaa3ec6b89c788a1679346f0398e06dbc33b9f55
pdf-font-stream PDF embedded font (sfnt) at offset 0x9788 10200 bytes