Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa83ceea82749b57…

MALICIOUS

PDF

34.8 KB Created: 2020-08-24 04:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db513a2085e7bb1b3014e5dbb42a4dd SHA-1: a958a4ded69ac32af74c12bef65736494486fb9d SHA-256: aa83ceea82749b575172fec36807e68a98ed970901a568cfb602b66ea08789e9
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body contains text related to 'Ashford oaks primary school uniform' and numerous embedded URLs, including a primary malicious redirector at ttraff.com. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the 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.com/pify?keyword=ashford+oaks+primary+school+uniform
    • http://tosod.equinewellnessservices.com/uploads/1/3/1/1/131164250/7436592.pdf
    • http://files.petalsofme.co.uk/uploads/1/3/1/6/131606502/vigutu-jogujirujimute.pdf
    • http://files.live-for.org/uploads/1/3/0/9/130969683/fawusip_bokubazifusetok.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/51248064838.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/nitusunurasavisasusunoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/solving_equations_and_inequalities_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3508/0342/files/43593392194.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/jaxurapumoxajoxijila.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/ias_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/biblia_cristiana.pdf
    • https://cdn.shopify.com/s/files/1/0457/8118/8774/files/71707400890.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/53391216395.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/37170064326.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/kimis.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_off000048b1.bin
cc2730d7b8b59a682e3efb4f5179bca7ab0b9c787b829aa4001e43e805a101c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B1 5552 bytes
font_01_sfnt_off00005b7c.bin
176b72da1ca50f4503996ebe9b19ba3c002f1c7f1bc4ad7adcfaa71d863cfd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7C 10148 bytes

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