Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69ca02dc7719c8f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 23:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33816756714908765e4066dd3080b4c7 SHA-1: 6effa212cee28b59c98ac78f9a508a1689c33a5d SHA-256: a69ca02dc7719c8f92d641d940f515432acc045cde1231a09fa174890b88c21f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify-hosted PDFs, indicating a link farm strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which likely serves as the initial stage for delivering further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.link/pify?keyword=dark+imperium+plague+war
    • http://files.christopherjungo.com/uploads/1/3/0/8/130874160/03c2d73c4.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/android_won_t_connect_to_hidden_network.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/naxuzuzal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/34128196716.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0775/files/70434576097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/zujoluwivomutegadusaxubar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/concepts_of_symbolic_interactionism.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/vagezofakawubujidos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/kappa_mikey_theme.pdf
    • https://cdn.shopify.com/s/files/1/0466/5989/5461/files/fifalipoko.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_off00006495.bin
346d78c282959a81756c0626394139755834bba887419a2df9b6dcf47f2869cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5116 bytes
font_01_sfnt_off00007602.bin
5c4520316de9ed841cbf58313ac239b11b7a4e9acc6932f04aea22437a82e824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 9704 bytes

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