Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83d013f8e5da582…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 07:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9639fd52bf0dd4bad2086de1854b1e73 SHA-1: 7002ea7590cff761b81e1581803468cb24e95a9a SHA-256: b83d013f8e5da5820cf8dcf8441a4830b6b6c7c524aad8c657d75e1dd33dafe7
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 a link farm hosted on cdn.shopify.com. One of the embedded links, https://ttraff.com/pify?keyword=big+rich+town+ringtone+free, is identified as a malicious redirector. The document body contains garbled text but also includes the malicious URL and several benign-looking URLs hosted on Shopify, suggesting a lure to trick users into clicking on the malicious link.

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=big+rich+town+ringtone+free
    • http://botaju.ringettegoalies.com/uploads/1/3/1/3/131380600/4827e5f75ca2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/stardew_item_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/femidadedegekebofizimozem.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/52890807231.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/gafed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/61656076718.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/b_v_ramana_maths.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/the_4chan_serial_killer.pdf
    • https://cdn.shopify.com/s/files/1/0446/7684/1635/files/vopuruseregupujenegomozot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/fur_elise_sheet_music_flute.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/arrogant_worms_happy_birthday.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/star_wars_force_unleashed_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/xajelejumunavotavule.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/gadomokoboxewuromodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/dragon_ball_z_super_android_13.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_off00006671.bin
016293b87f401c34060932fa2603e871db61ca9a545bc152a3fa304f1f220fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 4864 bytes
font_01_sfnt_off0000770e.bin
cecdb21570d721a0230fba0c5e08925133d31f733c48b0fccdadae50abb64958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 9924 bytes

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