Malicious PDF — malware analysis report

Static analysis result for SHA-256 82caa5f9baa57cc6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-14 10:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f663fe0ec70e1ae6157c28c557ac1d0 SHA-1: 82390309257b3a356ffefd1a618b0be3cfc999a5 SHA-256: 82caa5f9baa57cc61173cabf7edb6ff37a98cfeb92a387ed01633db6bdd8309e
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a fantasy football cheat sheet. The link leads to a redirector service that ultimately points to a PDF hosted on Shopify, but the initial redirector is flagged as malicious. The document body also contains numerous embedded URLs, many of which are also PDFs, suggesting a link farm or redirection strategy. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fantasy+football+cheat+sheet+2019+yahoo
    • http://files.earlynutritionmeeting.com/uploads/1/3/1/8/131860204/wikezin.pdf
    • http://files.clickclackfitness.com/uploads/1/3/0/9/130969352/lukanowazu.pdf
    • http://digilem.alexoconnor-onlineportfolio.com/uploads/1/3/1/0/131070450/ff5abcb118fd7c.pdf
    • http://files.engiellepaguican.com/uploads/1/3/2/7/132712324/486824.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/68897032839.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/54533591831.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/63539714274.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/21765652818.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/savidate.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/i_doser_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/how_to_draw_a_3d_rectangle.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/vupojibut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/wepojevaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/vodekaxejawifobirato.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/ledor.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_off00006b01.bin
7ebd7586373d33d0c99be034183420d38146b90c31582ef4764a1692fc67f775
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 5552 bytes
font_01_sfnt_off00007df1.bin
6591ebea013b859d05af0ba7d5144496f14bbc80d750659edd32d2a93fa2eb95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF1 11104 bytes