Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9326eaa5ceacd6…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 08:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9ce2720ac56f3f92747166130c5cc8 SHA-1: 8d24dd2d37ed5f5e0607f30af095da072258d0f1 SHA-256: 4b9326eaa5ceacd6c39c2cfba0140f4f9ebcf3d02612af2e38809bd30791e38e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=parallelism+worksheet+pdf, which is likely used to redirect users to further malicious content. No scripts were extracted from this sample.

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=parallelism+worksheet+pdf
    • http://potube.bigbearsartstudio.com/uploads/1/3/1/4/131437261/2587334.pdf
    • http://files.escollins.com/uploads/1/3/0/7/130739251/bekozinixekesasaxake.pdf
    • http://fawozuto.asfabbq.com/uploads/1/3/1/3/131379530/4196160.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/73166828724.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/57425801142.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/vetesexeta.pdf
    • https://cdn.shopify.com/s/files/1/0441/1061/0584/files/53158223995.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/15734923378.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/fidojamesapunaliv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3532/6624/files/bushfire_prone_area_report_vic.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/fozakabatosuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/36010978883.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/super_mario_rpg_the_starlite_worlds.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_off0000634e.bin
e4b9023aea23c00373b21be1925db5b33bd95664e78e748eb4f6afe0b47ec7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 5436 bytes
font_01_sfnt_off000075b9.bin
4f07e903d3d639ca59e8081b4867d22ac91e7f9b2566033bd5244a1f7b0632e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 10364 bytes

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