Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2205b9dce1ca015…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 01:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c827d9d7e0c1ab8c09532967d86bfc9 SHA-1: a1cb4928002cbb6b1dc273439f16b541e1195651 SHA-256: c2205b9dce1ca015d9f8400bdcb80e7d0e8660610c4e1fde11da2918923ce33c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=properties+of+characteristic+function+pdf'. This indicates a phishing or social engineering attempt to lure the user to malicious infrastructure. The document body itself is heavily obfuscated but contains the same URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, 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.cc/pify?keyword=properties+of+characteristic+function+pdf
    • http://files.gracebiblefellowship.org/uploads/1/3/1/3/131379117/gunedujitewu_gonegapodona_ratajagediver_kinogedejag.pdf
    • http://files.vintagecycling.org/uploads/1/3/1/8/131857690/gutadowatupuwekal.pdf
    • http://files.mrstrizz.com/uploads/1/3/1/4/131437307/vofapi.pdf
    • http://files.allianceheh.org/uploads/1/3/1/1/131163643/xilone_fanemer_velivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/84124645111.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/94560372737.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/texewanuvumexarope.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/gugabekinujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/niwuwukanezex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/save_tumblr_likes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/32658843816.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/a_story_of_yonosuke.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/dufiditelapa.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_off00007171.bin
08a53bddc7ded51c3731dc6d752137a213656aff8ed4886ee1eddcb9bbc61360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 5212 bytes
font_01_sfnt_off0000831e.bin
92215a4ebdd39571b977c2338c4f6ec24f2454f0459fcaf8c904d00ca3753d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831E 9836 bytes

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