Malicious PDF — malware analysis report

Static analysis result for SHA-256 b670f7558c0be283…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 08:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8769dbd8967400c6145703b8cc887d20 SHA-1: 5b6ddb1cf32c5b66a4f617f46f5aa5b063fb9704 SHA-256: b670f7558c0be283c91f5961598c07791637b970efb573ff66fe5a31a9e4d0cb
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as malicious. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or further malware delivery. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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.ru/pify?keyword=fridge+temperature+log+sheet+free
    • http://files.tottenhamcommunitychoir.org/uploads/1/3/1/4/131407944/8229e0.pdf
    • http://files.highdefgeoff.com/uploads/1/3/1/4/131484029/sonovigugav-palugi-fevozezuwujufoz-gopedabedukugi.pdf
    • http://lubar.littletoncrabappletrail.org/uploads/1/3/0/9/130969352/xuzafadudatizami.pdf
    • http://files.alohaestatejewelry.com/uploads/1/3/1/4/131482939/9e7664d6e.pdf
    • http://files.iansturgess.co.uk/uploads/1/3/1/1/131164314/9444547.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/55172128725.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/blockchain_for_dummies_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/viwutosovuxifur.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/4985/files/html_input_type_file_accept_only.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/88258727562.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/norditrack_cx_1000.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/self_certification_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/sowobazoluvaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/11992490775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/jotufipozeritewetirito.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/63101479696.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_off00006506.bin
76d77b0d394df81dc08ef15283c4bbd9c2a3f67e8bd960de0acc873909f4dded
pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5412 bytes
font_01_sfnt_off00007748.bin
adfa76e0a0fe9e348133b4772059be1bfca904919f74494b7bd5903e885ae80e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 12388 bytes