Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7fdc0445a24375…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 13:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 833cd1e659ad956ee23d30c6177c081c SHA-1: 98e1f2c4687f6de3c71379a8a15f5aaad065422c SHA-256: 1c7fdc0445a24375bc5580e6c8731f9f721cfcb85227d13fa950383b2014a499
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Battlefield v mobile apk'. It also features a mass of external PDF links, many hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The presence of a visual download button further supports the lure. The primary malicious IOC is the redirector URL, which likely leads to a second-stage payload.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=battlefield+v+mobile+apk
    • http://files.cosmetictattoostudio.com/uploads/1/3/1/4/131453267/naxopof_zisape_palisiw_fonesemidux.pdf
    • http://wiboli.theaustintexasteaparty.com/uploads/1/3/1/3/131378960/xaduma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/catalog___panasonic_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/exercises_for_wrist_pain.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/bimamubageti.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/38722187286.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/pujanefiminadunarilatazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/game_burn_world.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/fegarimorukezil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/98992499132.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/25978998752.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/19189334274.pdf
    • https://cdn.shopify.com/s/files/1/0437/6379/4069/files/the_blood_knot_by_athol_fugard.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_off00005c8a.bin
0b8f3cbf06bb6d9ab7f651b3bd8dde8327f527d8f29b867254d16c207a23d830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8A 5224 bytes
font_01_sfnt_off00006e4c.bin
544828eee5ea5de2965a2a2e4e5ba83cb458d939904ba2c9aceffc40129f7cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 9888 bytes

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