Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15f8e7c1e7079ef…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 09:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 812de2c352407a3cb8abd96d25816019 SHA-1: 1612fe649aeb81984d2ba04525523486d3488c36 SHA-256: a15f8e7c1e7079efc4c4876ebc5aad97814c8264b90ec1aebfa73168a84798f7
140 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a 'recruitment' theme, which is a common lure for phishing and scam operations. The presence of a callback lure heuristic further supports the phishing pretext. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=vcrc+recruitment+2020+pdf
    • http://files.waveloopart.com/uploads/1/3/2/7/132740343/883d0.pdf
    • http://files.montessoriassothailand.org/uploads/1/3/1/3/131379276/joloru-jitebafajevoz.pdf
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/jam_mathematics_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/zezebozukogofituvagofuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/kumuwaza.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/ecology_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0880/3495/files/71096082319.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/vowawuvumejabutewamotut.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/pevumepilila.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/bosivitugadifiruvegim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/luxitisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/76386933877.pdf
    • https://cdn.shopify.com/s/files/1/0434/4050/4999/files/borg_scale_of_exertion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/xezodul.pdf
    • https://cdn.shopify.com/s/files/1/0439/2815/8363/files/4772593497.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/paxizesizi.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_off000065af.bin
998ffc540dc5b81a7625a9e235f500b4c93bab097a846d1227dd214fda88324c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 5120 bytes
font_01_sfnt_off0000770e.bin
a285c24e2c1f0946e82c06da7f04be5d5f85a5fb916b46b19f886b5a2796dc29
pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 10204 bytes