Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8889f07e0c92078…

MALICIOUS

PDF

69.0 KB Created: 2020-08-08 22:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af7874e461abc07c4fa3e898fa177ba SHA-1: b2b51caac66684bd9eed0592b7e894a7667bdcae SHA-256: d8889f07e0c920782bf382be8dbad6cbaa08b9dc62ff2186fe38066080511c65
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a redirector link and a payment redirection lure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. The presence of a 'download button' lure further supports a phishing or malware delivery attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=balance+sheet+example+problems+with+solutions+pdf.

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=balance+sheet+example+problems+with+solutions+pdf
    • http://files.snackscast.com/uploads/1/3/1/6/131607930/bcbb99.pdf
    • http://files.haymakerprints.com/uploads/1/3/0/7/130775257/zidozeg_kesiwibolubod.pdf
    • http://files.jeffcrowell.com/uploads/1/3/1/4/131438501/ba843.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/definition_of_family_planning.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/zosanitimipozepejelusogan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/dogonuzelutokulupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/notadenagefajofakiwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/old_bengali_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/4060256657.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/33263489792.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/91069057658.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/48872032347.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/gokigokolus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0438/files/luwosifilegup.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/27815545797.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c120.bin
380e5682c1bf86cbd654a07170ed3b8ba54de4f313f76d22cbd58f4c8a3c4de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 5628 bytes
font_01_sfnt_off0000d40f.bin
d988f8527fad06e70eb5b21b113dcb476412e6c405de178ea46f4a88d7f17f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 10580 bytes
font_02_sfnt_off0000f827.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 4324 bytes

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