Malicious PDF — malware analysis report

Static analysis result for SHA-256 4754d6b39281aa08…

MALICIOUS

PDF

52.1 KB Created: 2020-07-27 14:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07c72ff79db427fdf2848474a872c52 SHA-1: a7ed57f7b84d91e6f4ae3c6f3b513e968a5ec482 SHA-256: 4754d6b39281aa087c96ad6e890e08713c034f45104523755b4d142ef7907d9d
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links points to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, indicating a programmatic approach to creating the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=kaththi+sandai+movie+theme+music
    • http://files.ncam.ac.nz/uploads/1/3/1/3/131383318/famepepotu.pdf
    • http://files.nanopcm.com/uploads/1/3/0/8/130813667/423770.pdf
    • http://files.lifeonthevineministries.com/uploads/1/3/2/7/132710628/zakomunupaxeva.pdf
    • http://files.leongathletictherapy.com/uploads/1/3/2/3/132303068/sudaxuvizenu-joxanow.pdf
    • http://files.gekkosubudbali.com/uploads/1/3/1/4/131437438/4188892.pdf
    • http://files.leongathletictherapy.com/uploads/1/3/2/3/1323
    • https://cdn.shopify.com/s/files/1/0431/1180/9190/files/gelojepojotabire.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/92133773347.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/kaleziwazepasanapawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/masez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/sugidode.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/sovinudalajorax.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/44416358461.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/60675314545.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/xowugovasemuxas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/pomekixojokibeno.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/xotepeta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ad9.bin
9b67908f6fa9b389e1b51697917d460bc2dde7bec7f96d0fac26ea8d72abc306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 4964 bytes
font_01_sfnt_off00008b92.bin
5628e41b352237a1469b2d0e4a25bc2ab33f3a629d3bef5b2e4583a5a0d4b773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B92 9736 bytes
font_02_sfnt_off0000ad24.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD24 16164 bytes

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