Malicious PDF — malware analysis report

Static analysis result for SHA-256 f128517813111a5b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-09 22:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d2e8f17b6ae41a63fee95bec140657 SHA-1: 5b0377f294125713369bea38003682aa78ccd3cd SHA-256: f128517813111a5bbf252001e69417c4ddd72a46b85433257dd77d9b6b690a2d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Adobe reader pdf download free windows 8', suggesting a lure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=adobe+reader+pdf+download+free+windows+8', which is likely used to redirect the user to a secondary malicious payload. Numerous other links to Shopify domains were also extracted, though most were classified as benign.

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.com/pify?keyword=adobe+reader+pdf+download+free+windows+8
    • http://files.jazzstylez.com/uploads/1/3/1/3/131380895/tagekaziludumivub.pdf
    • http://files.hallchristyhouse.com/uploads/1/3/1/0/131070912/mulozufite.pdf
    • http://files.southtownscatholic.org/uploads/1/3/1/6/131636990/3996155.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/34689433493.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/jay_sean_down_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/29094359156.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/22940878209.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/kivemapapolurabuzomusazaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/54349851780.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/data_analytical_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/copepodos_marinos.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/9301575214.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/77227085643.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0995/files/78537541392.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/badisodewasibesikole.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_off00005d72.bin
1813a17404e21dfca150613c66e29149a0b9c78f7faeb447f964f7a19ae387ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 5452 bytes
font_01_sfnt_off0000700e.bin
31f3b85d8cfdefc7747aa9ba4f43592d645017c2978a3eb3657b12e045eaead3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700E 10444 bytes

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