Malicious PDF — malware analysis report

Static analysis result for SHA-256 84396b8000f45bb4…

MALICIOUS

PDF

34.6 KB Created: 2020-08-13 04:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24987d7fbc9e6b350480bde84ee6995 SHA-1: 509443b4c9af3335babade85c49ec597c957d005 SHA-256: 84396b8000f45bb4432bd09a883b7fef8cfbe315981a6261cd59ac16c43d3443
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many hosted on 'cdn.shopify.com', suggesting an attempt to manipulate search engine results or host malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves redirecting the user through a chain of URLs.

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=catia+v5+tutorials+mechanism+design+animation+release+19+pdf
    • http://files.afrocamming.com/uploads/1/3/1/4/131438111/fepozoxezopezub.pdf
    • http://files.goldcoastcreatives.com/uploads/1/3/0/7/130775668/vatilakuwakodelen.pdf
    • http://files.nmnawgj.com/uploads/1/3/0/7/130775223/6274705.pdf
    • https://cdn.shopify.com/s/files/1/0454/7893/6728/files/65762024864.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/piladilemuzep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/43659658240.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/74653089460.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/78796374803.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/spasticity_pathophysiology_evaluation_and_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/rosevogitoxukuzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/97616640396.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/george_strait_run_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6521/3079/files/30334863531.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/kexapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/46287728478.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_off00004799.bin
284215ea6a2646e69be50a6a6619226e0388786e30fc56ef2b0444e6f1b58316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4799 5868 bytes
font_01_sfnt_off00005b81.bin
9900b351bbdb3e0ccd507929c8723df7e80343326270407e9478bea1ae47cb79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 9816 bytes

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