Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf585d1ce9c4bc2…

MALICIOUS

PDF

34.0 KB Created: 2020-08-26 17:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c15d9ddc982eb3b8ae2b4e641c4e825 SHA-1: 0bf2e2525856b748d17c04f4827e113d31e37356 SHA-256: 2cf585d1ce9c4bc29b2bcfd95a8264dc66a66d9836d0dd276237a1caffd5272f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=muzhumathi+avalathu+song+free+download'. The document body, though heavily obfuscated, contains similar text and URLs, suggesting a lure for free downloads. The presence of a link farm heuristic further indicates an attempt to distribute content via numerous links. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware site.

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=muzhumathi+avalathu+song+free+download
    • http://jopodew.dulcineaquartet.com/uploads/1/3/1/4/131408071/31561b339bcad.pdf
    • https://cdn.shopify.com/s/files/1/0462/0363/3817/files/esc_guidelines_valvular_heart_disease_2012.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/28062038333.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4177/files/lirigivojidewulowuvumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/woodland_washington_weather.pdf
    • https://cdn.shopify.com/s/files/1/0462/6179/7013/files/suwazegufupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/64807582125.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/performance_appraisal_sample_wording_decision_making.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/advanced_analytics_with_spark_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/78484656940.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_off00004760.bin
f90f96c05cc907bb1ad8427661436288e411692e9cc1323ce8017a62eaec3c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4760 5528 bytes
font_01_sfnt_off00005a2a.bin
19fae828683a1312754177d4b72979bd2b5aeec4f9f8f585b1667ec02559c573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2A 9764 bytes

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