Malicious PDF — malware analysis report

Static analysis result for SHA-256 28748afa6accdc49…

MALICIOUS

PDF

45.6 KB Created: 2020-08-18 13:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734b221e8dfa5cee9f56a91951852f0f SHA-1: cf90a2539a509f9438dfa7d383ca5da46f478162 SHA-256: 28748afa6accdc49647f23081179e8946eb8e9b305a294cb65cce1f926fdd811
120 Risk Score

Malware Insights

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

The PDF file was identified as a malicious redirector and a link farm. It contains numerous embedded links, with a critical heuristic firing on a link to `ttraff.ru`, a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content. The primary intent appears to be directing users to potentially harmful external sites.

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.ru/pify?keyword=b-+form-+group+horizontal+label
    • http://files.liveopenly.net/uploads/1/3/0/7/130776142/timefigasalo_fefuriridijudew_sozerajiwi.pdf
    • http://files.editmythesis.com.au/uploads/1/3/0/7/130776033/6fab8d52e4a.pdf
    • http://files.gorksgoodfilla.com/uploads/1/3/0/8/130815228/3290323.pdf
    • http://files.davidvail.net/uploads/1/3/1/8/131871772/vudipurefejame.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/5263752914.pdf
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/50781210925.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/rikogolubazaxive.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/liluduzasabuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/namodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0297/files/comfortably_numb_pulse_solo_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/bodybuilding_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/navso_p-_3013-_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/livujudulavulufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/gelasafenopinomoxatozol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/misovovobexa.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_off00006429.bin
e0473ee6849116b69330e316d561af1285fc28d5ff0b3dbc705d52f9868a184d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5408 bytes
font_01_sfnt_off0000767b.bin
8a2d97d951c7973fdf9b42dc6e43abf06b9da482a87957090074321f9346fa81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767B 15648 bytes

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