Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbf1285378b4f3d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-05 11:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410cf1f5f04373f57024f060d969455b SHA-1: 17dfb0e59270b03095710de53120244e129fe434 SHA-256: 4dbf1285378b4f3d5dd265f7d1175cf0435a54553728d47844d0fb2fbd5778af
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=tipos+de+tanques+de+almacenamiento+de+agua+potable+pdf, which is likely used to redirect the user to a malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=tipos+de+tanques+de+almacenamiento+de+agua+potable+pdf
    • http://files.beratungen-therapien.ch/uploads/1/3/0/7/130775462/5974136.pdf
    • http://files.coryblake.org/uploads/1/3/0/8/130874141/8777e5e.pdf
    • http://files.thebankofguns.com/uploads/1/3/1/6/131637226/medefazok-musadosuziropo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/84664235366.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/sukom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/diderodagadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/chainmail_armor_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/lozonovubulesidovugozal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/finojagarutaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/kavolikidezezige.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/excel_macro_save_as.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/50851918956.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/31709739247.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/generative_adversarial_nets.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_off00006d64.bin
b77815dc856027b25d82b8862b11dc0032c5ccdaf8745c1bee3a294e76690f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D64 5592 bytes
font_01_sfnt_off0000804e.bin
f58ab0e1c895a6cd5b2de7e72f4705085b755517f7ad5a448baddaf2847c4421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 10828 bytes

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