Malicious PDF — malware analysis report

Static analysis result for SHA-256 b344eb9506b5644a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 20:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feed99c1c489ace239881b179713e743 SHA-1: af64b766ffffa6d023a9cf535837f6f6cc0406e7 SHA-256: b344eb9506b5644a1b4e2fefca9ed6ed74ae3c6041d38d96e10aee149ebc10e0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning and link farming. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains references to academic materials and the URL 'https://ttraff.com/pify?keyword=social+research+methods+bryman+5th+edition', suggesting a lure to a fake academic resource that redirects to 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=social+research+methods+bryman+5th+edition
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • http://xetemifek.wact.org/uploads/1/3/1/4/131437237/611513.pdf
    • http://files.hughesphotography.com/uploads/1/3/0/8/130814124/navoxisuwunewiwumif.pdf
    • http://betakeru.reviewgraphs.com/uploads/1/3/1/6/131606165/ca6fd2bd79992ee.pdf
    • https://cdn.shopify.com/s/files/1/0435/8347/1771/files/animal_crossing_new_leaf_guide_face.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/fozex.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0466/files/temple_run_apk_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/7801/7443/files/rifefawaluruteliwod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2287/6826/files/datonifelujumis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/http_biologycorner._com_worksheets_controls._html_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/84766140696.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/jurnal_bacillus_thuringiensis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/mathematics_for_commerce_economics_and_business.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/vasavofukepagitulo.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_off00005f24.bin
6b85b9740870e37b9cc2d4c5f50a2deaba4f026e9da64b4f478fb1737c92d114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5648 bytes
font_01_sfnt_off0000721f.bin
ce2f024083aaca17e66943532b4bdc49b66dcdff21a038159b75b32eb75c106b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 10428 bytes

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