Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68debb9549cd15a…

MALICIOUS

PDF

37.0 KB Created: 2020-08-21 13:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f3d5d0a83fa863bb1fe10ab5e079804 SHA-1: 74a9716fb238d72f2a830261940c12f74de80479 SHA-256: c68debb9549cd15ae2656d0a678308ab2503d4613a8350d8acf7fb5b58951c8c
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=beths+6th+form'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links, many of which point to benign Shopify URLs but some to unknown domains. The document body, though heavily obfuscated, contains the malicious redirector URL and a list of other PDF links, suggesting a lure to external content. The presence of a redirector link strongly implies an attempt to lead the user to a malicious site for further compromise.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=beths+6th+form
    • http://vunolul.seriousweightgainco.com/uploads/1/3/1/6/131607575/vosasopoparewam.pdf
    • http://files.lgeyecare.com/uploads/1/3/0/7/130738805/61d316aa85520.pdf
    • http://files.dechineselincs.com/uploads/1/3/2/8/132814439/pevofuminasoze.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/vozuxozekojunuzekedozowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/84607650977.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/bukurogigekaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/tixafuragew.pdf
    • https://cdn.shopify.com/s/files/1/0452/1161/5392/files/fexupulewajuparel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6947/files/psychometric_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/red_sea_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/72362998590.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_off00005277.bin
685e72017e07cb07533f610675a0d95449de99434b63274384f8fd5b57c5542d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5277 4968 bytes
font_01_sfnt_off00006341.bin
81dfd04ecee53632e12a4997bc3bc348546853102d1544e772bb1fb32f7e6d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 10784 bytes

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