Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f4de0922c47a4d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-03 14:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce9d951c047a809662e9675afbc8408 SHA-1: 8e722b3aafa2fe87837f6756d1db5db3881a4254 SHA-256: 51f4de0922c47a4dd8cb50e1b5e54bc3c3515f8d11e42372822d023eb1fef410
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=dreams+by+langston+hughes+analysis+pdf'. This suggests the document is part of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=dreams+by+langston+hughes+analysis+pdf
    • http://files.elitetrackandfieldacademy.com/uploads/1/3/0/8/130873781/dizome_loxinutowej_gixar_vixapaxoper.pdf
    • http://files.brandyringer.com/uploads/1/3/1/3/131379325/wefinumavipatob.pdf
    • http://files.acutabovesalonvanwa.com/uploads/1/3/0/7/130776077/voriwi_gogikowawapuwe_kedarefa_jazuginu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/kogonizigil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/zamegapitugolovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/41471609369.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/tolipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/2973876111.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/tedetitimikexitur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/zizoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/46725167871.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/20146659238.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/lakuredusonubelovaxuvep.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_off00005f70.bin
634d28305a7f4d392bc550c92dadc5d918ea59f7c30bd37f3837c4b876781244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 5576 bytes
font_01_sfnt_off00007231.bin
4bbd6d14f0d36dd9b9f88ebd067b533f91794fd9b34981eb6ba70b31da2a5065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 9484 bytes
font_02_sfnt_off00009267.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9267 4324 bytes

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