Malicious PDF — malware analysis report

Static analysis result for SHA-256 27131416c2739e4b…

MALICIOUS

PDF

44.0 KB Created: 2020-08-26 18:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6235a0afc87823feb67c010f1333b7f SHA-1: 7a548560be39b57a27339c60fba535c49ba8824e SHA-256: 27131416c2739e4b26771d3f6d278e6191986a8eabf8d03dcba33be85d8f052d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it's a malicious redirector, linking to `ttraff.ru`. It also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The presence of a 'download button' lure further supports a social engineering attack. No scripts were extracted, but the primary attack vector appears to be directing the user to malicious infrastructure via embedded links.

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.
  • 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
  • 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=oblivion+natural+environments
    • http://files.scafcincy.com/uploads/1/3/1/4/131437119/bemukuxivakugesi.pdf
    • http://mixupixoz.continentalplacer.com/uploads/1/3/0/8/130873982/63ff5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8568/4124/files/zonunimoxijigovutexutonad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/sotirejinirosakodel.pdf
    • https://cdn.shopify.com/s/files/1/0441/2299/6888/files/79156159384.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/vafikagipelaxotigodal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/capitec_learnership_2020_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/4442/9984/files/telotetojunimedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/86402651414.pdf
    • https://cdn.shopify.com/s/files/1/0430/9539/2409/files/dawekagiwemepop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/64844736922.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/konubanuse.pdf
    • https://cdn.shopify.com/s/files/1/0463/0396/9437/files/pizza_hut_email_address_format_uk.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_off000062f2.bin
bb65494f303862cf0428b63f0719f288ba31a8f0659f9362fe0cfcf255cc9f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 5056 bytes
font_01_sfnt_off00007407.bin
7a576c004db8367f30b05aa06dbaa12f27dd05a8a6df5008a92f6a063e7aae9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 14956 bytes

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