Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03e0a6dbd052296…

MALICIOUS

PDF

56.8 KB Created: 2020-08-09 22:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d32a682d132993c346d4c313b7dfdb6 SHA-1: 1d2856c56291dda7ae319df2457385ee61a669ef SHA-256: f03e0a6dbd052296249835ff442e922a9165551e126e8cd76e046d4c8f5c1f64
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users interested in supply chain strategy. The presence of numerous external PDF links further indicates a link farm used for SEO poisoning or traffic redirection.

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=supply+chain+strategy+pdf
    • http://nusexaxon.datsonhughes.com/uploads/1/3/1/0/131070374/2136947.pdf
    • http://files.skyleblanc.com/uploads/1/3/1/6/131637034/sabosutukitikusuwiw.pdf
    • http://puziluga.broadcastcoffeeroasters.com/uploads/1/3/0/7/130776208/6749352.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/1289126159.pdf
    • https://cdn.shopify.com/s/files/1/0440/6801/2182/files/wezaviv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/xasijulimolalotodujibev.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/pixark_item_id.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/36644593920.pdf
    • https://cdn.shopify.com/s/files/1/0440/0365/5830/files/iccesen_2020_abstract_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/28506823914.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/supabosisumirubamis.pdf
    • https://cdn.shopify.com/s/files/1/0441/4049/5000/files/rig_veda_sandhyavandanam_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2543/8619/files/casio_fx_5800p_land_surveying_programs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/laxunavazuku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/pefek.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_off00009e94.bin
39a6a63349233eebfeb744d56621dfd358e2ddbbfad322140569d94c4db244a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E94 5620 bytes
font_01_sfnt_off0000b1b0.bin
08fe78e9528c2028e96375f8cbf449a6f2ea6c8cfb76bacb412b907bbe2b9b99
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B0 10744 bytes