Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f13cf9a2817e012…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 00:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b175f6cc69e099c5712a82374bd2d30 SHA-1: 09f4446a565b49e3e76a6f4c03b682da3168b444 SHA-256: 9f13cf9a2817e01243a7d84176ab9182a882e90d3ac1be1ec86b29a3310cb18c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link

The PDF document contains a mass of external links, masquerading as a download for Adobe Reader. The primary link, https://ttraff.cc/pify?keyword=adobe+reader+11.+0+10+for+windows, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the lure and the malicious URL, reinforcing the social engineering attempt. The presence of numerous links to Shopify-hosted PDFs suggests a link farm designed to improve search engine ranking for malicious downloads.

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=adobe+reader+11.+0+10+for+windows
    • http://fakuzu.radio91.net/uploads/1/3/1/4/131453495/5545939.pdf
    • http://files.theboxdonut.ca/uploads/1/3/0/8/130874114/155016.pdf
    • http://files.dandelionartcenter.com/uploads/1/3/2/3/132303314/690da.pdf
    • http://files.lastcallromanceband.com/uploads/1/3/1/4/131438658/1811979.pdf
    • http://files.plastersurrey.co.uk/uploads/1/3/2/6/132681694/dcc47.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/36832065805.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/basic_grammar_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/bivokitosudanefuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/fewafupalinirigejam.pdf
    • https://cdn.shopify.com/s/files/1/0438/1130/7682/files/wexokowufezawaxesis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/dogowulikokorexetej.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/robef.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bright_futures_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/final_fantasy_7_cue_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/gubedirezexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/44142142743.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/ccrn_review.pdf
    • https://cdn.shopify.com/s/files/1/0440/8265/9493/files/lawabenadofozesutejarinat.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_off000062bd.bin
5c03d553704d6d5a35cee5907858e4dd0b118efdee5f09c959e10255a9741063
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 5316 bytes
font_01_sfnt_off000074f6.bin
a42ddc99765d8d9e6332e1b0600b693ee36f595254bb391f229c6dbda0714e59
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 13860 bytes