Malicious PDF — malware analysis report

Static analysis result for SHA-256 14547e3bb2eb2cbb…

MALICIOUS

PDF

69.4 KB Created: 2020-08-04 00:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35337d0cb4beae09c13bfc923f592644 SHA-1: df8d05a272abea38bc810788d212c4c4126a326f SHA-256: 14547e3bb2eb2cbb837f48a6631b28aa1a3abd3ae886801ebdde0efc10e19b00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other sites. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link farm or spamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ricketts+cephalometric+analysis+pdf
    • http://files.astaanaheim.org/uploads/1/3/1/4/131406717/1845470.pdf
    • http://depepof.dlrconstructionco.com/uploads/1/3/1/6/131607600/6941470.pdf
    • http://files.thehenrysplantfarmonline.com/uploads/1/3/2/6/132682607/9b7a27cd1f64.pdf
    • http://files.wetsunweekend.com/uploads/1/3/1/4/131454808/senog_tobis_zabunikapuno_gojijezujamat.pdf
    • http://files.oaktreeandtiger.com/uploads/1/3/0/7/130739949/kelelosofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/47006937166.pdf
    • https://cdn.shopify.com/s/files/1/0436/2082/7300/files/90295474307.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/rizeliludi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/12292269271.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/piluzizokunelofemofog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6157/5834/files/kujuriket.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/919065213.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/capital_budgeting_and_estimating_cash_flows.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/wizazitolevegoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/32233189059.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/memotod.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/h._264_vs_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/tejise.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d0.bin
c4ea73c86d8b1a6d4cdf4cfdff1dd351a96638d4c69b053c5cbe03faf499de41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 5568 bytes
font_01_sfnt_off0000e4a3.bin
cebb4cb9ef2920044d09303321e0ecd5e2d73c547641a2966078b2519bdb3d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 10408 bytes

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