Malicious PDF — malware analysis report

Static analysis result for SHA-256 38751bf13d092ade…

MALICIOUS

PDF

37.0 KB Created: 2020-08-17 04:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b9c5d1dad2ef030b3859574dd250cc8 SHA-1: 5aaed9b9d1c97bebca2958fe1ea7f1df4eeb61a5 SHA-256: 38751bf13d092adeaaa5d5c76e3e730435aea71a388dff3701cf2c6515cae4bf
120 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, which is indicative of a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at ttraff.com. The document body contains garbled text but includes the malicious redirector URL and several Shopify URLs, reinforcing the link farm tactic. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=current+atherosclerosis+reports+journal+impact+factor
    • http://dodab.missbilovsky.com/uploads/1/3/0/8/130814471/wulajadidofawonut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/rakusokigikekojijonagiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/tubuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/57906897674.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/32865650565.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/hunter_x_hunter_149.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/inorganic_chemistry_miessler.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/pikipezarodalutugidip.pdf
    • https://cdn.shopify.com/s/files/1/0439/4038/0840/files/free_coloring_bookmarks.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/synthesizer_software_free_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/semikur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/keto_diet_snacks.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/puvudajenerojewizigole.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/pokemon_crystal_gameshark_codes.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_off00005347.bin
973178141917011a03f0273440221fd46a9844c2dee8dacfd765c0532cf9f5de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5347 5236 bytes
font_01_sfnt_off000064ea.bin
f7c4c04a90e40b1930e3e39fe0c831d7c7cbdc641b7bc75bf44f6200f4e67f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 9848 bytes

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