Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecb5641c7600f9c…

MALICIOUS

PDF

33.6 KB Created: 2020-08-25 11:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf9c83f0d3aa5457860447a1c7ac588 SHA-1: ff366c7663c51c460cc7e2754009cb8d32fb2b8b SHA-256: 3ecb5641c7600f9c8de3fb63275ccbb014c493b027bc829bf85c98b19ce02a0e
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/pify?keyword=video+avenged+sevenfold+dear+god+lirik`. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs hosted on various domains, suggesting a link farm or redirection scheme designed to lead users to malicious content.

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=video+avenged+sevenfold+dear+god+lirik
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.tasteofpariscarryout.com/uploads/1/3/0/7/130775918/2067394b.pdf
    • http://xunulifu.ellisbirdfarm.ca/uploads/1/3/0/7/130739664/nedowuj-motabigefuwone-fapaxeja-sidezabaj.pdf
    • http://files.kbcfishing.com/uploads/1/3/1/6/131607110/9361482.pdf
    • http://sezogizon.en.fteacadia.com/uploads/1/3/1/4/131454106/xopizijude.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/rexoxomunokibuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/sexazixejuwobadopinobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/xikimezima.pdf
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/59696394975.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2208/files/speaking_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/66241808159.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/laruruwoxopez.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/48874493847.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_off000048c2.bin
2f8fbd11135866ce3ab1ea9edde3e0503202429d8a1ce716be29c0bfc062a727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C2 5164 bytes
font_01_sfnt_off00005a6d.bin
e80189d48a2729b3e9cafed1f5a9f23f0902ca0a3e979f9cb8837e0edbe48f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6D 9152 bytes

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