Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dc2671a2635c70…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 16:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43d4e027d6bdc9f5e731254e90cdceb0 SHA-1: 54eeb4c32ab48811b747ec3920c31eb572853303 SHA-256: a2dc2671a2635c70257669ad92d0686e2e836d81be14d3570de73d51289ec185
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the critical heuristic firing. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or malware distribution.

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.cc/pify?keyword=development+economics+pdf+todaro
    • http://nekosera.whalingfire.com/uploads/1/3/2/3/132302782/ketanawekiwow_zuzokupogux_sidadopupeja.pdf
    • http://files.ganaraskaglow.com/uploads/1/3/0/7/130775032/1103400.pdf
    • http://files.calvarysouthdayton.com/uploads/1/3/1/3/131398117/7eae6e26be0.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/bashan_250_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/derabitasinemajig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41230052817.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/life_selector_hack.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/34280593251.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/rusufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/golden_companion_scooter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/dnd_3._5_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/archie_vs_predator.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/sojejodagimox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/69154249855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/3002506827.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/valumikalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/57951462774.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_off0000658d.bin
522c3c446239e46e524d51d46408b8de1d3f322ca708d5fbff8b9eeb5aeabe27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658D 5360 bytes
font_01_sfnt_off000077c1.bin
d5de6d3a09c10d1b5e1ea62317651eb4438f239c0d2975e79a3b5f83fa386be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 9928 bytes

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