Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da4e8db54a18696…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 01:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf7a7e22385f20cc4c7045c468a68bc SHA-1: c0eb7f90d317ee2dd5014f1914be87ae9ed365e4 SHA-256: 5da4e8db54a18696b0c7fcdb29db8f4a5dd677bf33c3e0625d2cca75c8517293
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, including a critical redirector to 'ttraff.com', suggesting a link farm or phishing lure. The document body, though partially corrupted, contains the same URL and text related to leadership qualities, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.com/pify?keyword=best+leadership+qualities+pdf
    • http://files.swcfcu.org/uploads/1/3/1/0/131070434/tojasamufa.pdf
    • http://files.dralfonsomercado.com/uploads/1/3/1/4/131413718/jawazapugezare-poxesa-lixek-kubos.pdf
    • http://files.deltasurveillance.com/uploads/1/3/1/4/131483214/tasokamulejonavipofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/38956148582.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/11374553041.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/mafabubimifozuwov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8486/files/the_art_of_assembly_language_programming_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/jexegavepebomiriruviv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/rakuxamevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/busidosoxofobikuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/webataxanukalogesupufuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/76823289805.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/5008206408.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/68210455742.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659c.bin
883b0e83d99d5c70c17c6d5865b402db2b4839c49ac7ee5f5f03ae2b490ce9b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5304 bytes
font_01_sfnt_off000077a1.bin
2fd7c5b734312313176300cb1e6da256b0230fd90c553ce1c1d41cc6be9606fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A1 10328 bytes