Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a5c8513644e3aa…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 14:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06b9ee6b669c81c581f4647ea9605f76 SHA-1: 12928ff27968416bebfbf64e8d2978dd28c66545 SHA-256: 52a5c8513644e3aaf84987454280d18f02ab78918d6496b9d2965e8fbc5f10b8
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though partially corrupted, contains text related to 'work rules laszlo bock pdf español' and the malicious URL, suggesting a lure to trick the user into clicking the link. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=work+rules+laszlo+bock+pdf+espa%25C3%25B1ol
    • http://files.doggieandme.com/uploads/1/3/1/4/131484328/busugiwifixixa_wudejobuxewe_ludobadanexosiz.pdf
    • http://files.rsswellness.com/uploads/1/3/0/7/130776484/1651654.pdf
    • http://files.blackboxcosmeticsbeauty.com/uploads/1/3/2/6/132681438/kajupopijeze_dinetaximage_tadudejiwe.pdf
    • http://litazi.okiegirlscoffee.com/uploads/1/3/0/9/130969352/5668662.pdf
    • http://files.verticalgunracks.com/uploads/1/3/1/6/131606035/473729.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/10679483994.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/lista_de_adverbios_de_modo_en_ingles_y_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/lifom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/51064124154.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/fevapekeruxogaxadizafama.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/text_format_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/xebogulogikozivevupoluj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/dynamics_of_machinery_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/78752777976.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/vopuserine.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_off00006482.bin
7784ff1c013d693864fedda701cb3bf67694fafdce0bdf7415d11d8983f48f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 5628 bytes
font_01_sfnt_off00007786.bin
86f559650819cb431181b2e733585c4a7aa7887a0ac2f15e0de2bffd2d98d19a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 10616 bytes

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