Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e5e595aaeda0ba…

MALICIOUS

PDF

52.8 KB Created: 2020-08-24 01:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b54dad0c903559755ee505532fafef61 SHA-1: 3c57ca0d8d397c9a1500c455b2905464cf093d29 SHA-256: 39e5e595aaeda0ba0a13e80c065aab46256b347ac57f5396496c3120726ce816
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm, indicating a deceptive purpose. The ML classifier also strongly indicated maliciousness. The embedded URL `https://ttraff.cc/pify?keyword=aerobics+dance+music` is a known malicious redirector, suggesting the document's primary function is to lure users to malicious sites. The large number of links hosted on `cdn.shopify.com` and other domains likely serve to manipulate search engine results or distribute further 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.cc/pify?keyword=aerobics+dance+music
    • http://files.shisko.com/uploads/1/3/1/4/131406344/leralavamoxutinu.pdf
    • http://files.stillwatersec.com/uploads/1/3/1/3/131383429/722b93e75.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/mowamusonomafomid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/tavanupifikorunesobese.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/16323751972.pdf
    • https://cdn.shopify.com/s/files/1/0448/0591/4775/files/70552159487.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/murray_22_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/27321760292.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/93287853456.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/lajibujagosirunutomuxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/1652690382.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/66763423654.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/libro_catecismo_catolico.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/o_renascimento_carolngio.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/jukasapozapebebuzeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://www.youtube.com/watch
    • 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_off00008af4.bin
b057438843cf2f0b04712680d833c23a986a041c71f316701426c7f156594cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 5180 bytes
font_01_sfnt_off00009c6c.bin
78e9f5cb4a39bfce5f615bd53cb880defda46cba7fa6ec6a585c7b0863a16921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6C 13608 bytes

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