Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c600ea662ad8dc…

MALICIOUS

PDF

36.6 KB Created: 2020-08-13 00:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbe987a7822cb009525d91c9805283bc SHA-1: befec819613aa6e58bb8f1b84214e37368605ca0 SHA-256: 75c600ea662ad8dc91046802af68c8fd554ca2de7891d03efc93f3374b046e79
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination of the payload. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. The presence of a download button lure further supports a malicious intent to trick the user into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=celina+isd+calendar+pdf
    • http://files.lakequassapaugassociation.org/uploads/1/3/0/9/130969663/3857660.pdf
    • http://files.innerstateproductions.com/uploads/1/3/0/7/130775823/3f66de3b25df.pdf
    • http://files.veteransmemorialhighway36.com/uploads/1/3/2/6/132696214/f7063466549b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/bonakepilitinevume.pdf
    • https://cdn.shopify.com/s/files/1/0448/0807/7473/files/anatomy_of_brain_and_spinal_cord.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/asrock_a-_tuning.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/becker_cpa_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/53027005033.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/65229579176.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/i_love_you_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/57480082087.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/siginofi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/49719971973.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/zawogatot.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_off000052ca.bin
294051300f7daa9ea41efa74dbcb2f90a1774bf15c661529dee3e11cdfb7a396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CA 5052 bytes
font_01_sfnt_off00006401.bin
4d12a583c709ca399d07c6c8fe1edf92aa541eece8ca3eca1b8c76b6f677989b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 9752 bytes

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