Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a945c6a035472b…

MALICIOUS

PDF

57.5 KB Created: 2020-08-10 20:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5c5f831824a2c19022de57526e63255 SHA-1: 61c51ea4d8b85f5aa96285c3d8fef527106a0442 SHA-256: d9a945c6a035472beebb8d5bae6dc1028a6833b3833e8e29554fcf905b093963
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes a URL that appears to be part of an SEO poisoning or link farm strategy. The primary malicious link is https://ttraff.cc/pify?keyword=causas+y+consecuencias+del+cancer+de+pulmon+pdf, which is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=causas+y+consecuencias+del+cancer+de+pulmon+pdf
    • http://tigaled.beneficialreturns.com/uploads/1/3/1/3/131379730/pilebasaba.pdf
    • http://texemi.lillyzuckerman.com/uploads/1/3/1/4/131453698/mavonumipotisoxudo.pdf
    • http://pupatokuw.dearborncountyhs.org/uploads/1/3/0/7/130776330/7836475.pdf
    • http://files.vintagewoodworkingtools.com/uploads/1/3/1/4/131452735/kusukewe_temutojazasisej_mimug_gegokogajawusu.pdf
    • http://files.nativitymenlo.org/uploads/1/3/2/7/132741169/bapajiteto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdf
    • https://cdn.shopify.com/s/files/1/0448/0807/7473/files/minna_no_nihongo_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/sanidezafisonaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/4690/1672/files/xinamogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/razilufifatunos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/data_structures_and_algorithms_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/xexetinizategefimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/58619166314.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/zenadixafamozusepa.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_off00009148.bin
c823226ac6e935760f8deabd3f0f014e29dcfc7054f20193442b7af4060c515f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9148 5228 bytes
font_01_sfnt_off0000a2f2.bin
3788f6b7914813ff906d951b9011beb60001e7fffcf8be2e02cd591f624c8200
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F2 11540 bytes
font_02_sfnt_off0000c875.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 4324 bytes