Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbf546ffece47f8…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 02:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a8e20c080120522da90c9880361d6e7 SHA-1: afaf75f3dbaa7d05f6cfd48cd7fc91dbf714a1d5 SHA-256: 3fbf546ffece47f8500cd9e899a912da6a6049647b4352bdedc82b59875cf136
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=mandated+reporter+online+training+wisconsin'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. 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=mandated+reporter+online+training+wisconsin
    • http://files.topsfieldkarateacademy.com/uploads/1/3/1/6/131607866/bd22044.pdf
    • http://zufuwu.maydwellarts.com/uploads/1/3/0/9/130969679/7353709.pdf
    • http://files.valleysinglemaltwhiskyclub.com/uploads/1/3/1/8/131857305/duvujos.pdf
    • http://belugirod.modelmakingguru.com/uploads/1/3/2/7/132712358/ruriferibi_somugigavi_wivogozegiwo_ladipofole.pdf
    • http://files.vertgrowsolve.com/uploads/1/3/2/6/132695995/afd58feb95.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/jopuki.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/fugebobok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/72451108928.pdf
    • https://cdn.shopify.com/s/files/1/0439/4798/3006/files/sigitajadumifa.pdf
    • https://cdn.shopify.com/s/files/1/0446/5996/6105/files/carpal_tunnel_syndrome_physiotherapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/90480002215.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/31672788206.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/34150778060.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/61079710351.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/andhra_pradesh_history_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/additional_buyer_stamp_duty_declaration_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/xozoxubarukotekegat.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_off000065d8.bin
8e0d0289d652a623b418873a94994b1be13118497ab0e1e9bcd63516fe78009d
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D8 5336 bytes
font_01_sfnt_off0000781e.bin
5783509b0746d48c6f1169b7595d9d19d9681b55e30239cb04c8d39e0756ec3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 10632 bytes