Malicious PDF — malware analysis report

Static analysis result for SHA-256 24fc6078631175cc…

MALICIOUS

PDF

64.4 KB Created: 2020-08-06 03:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7923e881b61d1c872e7b6a3f9392bf SHA-1: fd70beeb0a910b7de0577882fd74d7fe20a970d0 SHA-256: 24fc6078631175cc886fb1ab32d3b711c5470ae392fc589ecfb4f883c895404d
120 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=retinopatia+diabetica+fondo+de+ojo+pdf'. The document body, though heavily obfuscated, contains text fragments that appear to be SEO keywords related to medical conditions, suggesting a link farm or SEO poisoning tactic. The presence of numerous external PDF links, many hosted on Shopify, further supports this. The primary goal appears to be redirecting users to malicious infrastructure.

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.ru/pify?keyword=retinopatia+diabetica+fondo+de+ojo+pdf
    • http://files.darinadenali.co.nz/uploads/1/3/0/7/130739185/5576080.pdf
    • http://files.icnorcom1970.com/uploads/1/3/1/6/131606392/5510841.pdf
    • http://files.notronmfgsales.com/uploads/1/3/0/7/130776728/xopoxef-dugivibip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2825/7685/files/84536780936.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/juwavafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/4405584059.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/papifisuzoxexonivugeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/microsoft_net_framework_1._1.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/60459405166.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/sezawomibel.pdf
    • https://cdn.shopify.com/s/files/1/0434/1874/7036/files/9942245290.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/latest_bangalore_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/muzeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/rukixunowikaxovika.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.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_off0000a583.bin
df236eea16627bffc6567dc008975eb1c349f0fcbf4929980695d54996de8524
pdf-font-stream PDF embedded font (sfnt) at offset 0xA583 5064 bytes
font_01_sfnt_off0000b6dd.bin
3ae433b2fe9ad4aa62ffc2c1c81574701e7de7677eb8a7fb0ae219a5faf0e8bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DD 11844 bytes
font_02_sfnt_off0000dd0a.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 16204 bytes