Malicious PDF — malware analysis report

Static analysis result for SHA-256 5263756456f3bd82…

MALICIOUS

PDF

43.9 KB Created: 2020-08-29 00:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b22f1f17a3bd6041d04cb1062dee03 SHA-1: 37dd9eb4503cc387efa2a6bd2d858ad2bd9fe272 SHA-256: 5263756456f3bd8299cd30ca43d9da7e128abc6d181649da7d87fed2469884a4
130 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=fry+sight+words', which is flagged as malicious. The presence of a 'download button' heuristic further suggests a lure to trick the user into clicking the malicious link. The PDF also contains a large number of links to Shopify, likely part of a link farm to improve SEO for malicious content.

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.ru/wix?keyword=fry+sight+words
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/80415797746.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/34647698765.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/word_module_1_sam_project_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/kenijokafebebamozowumab.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/bruno_mars_when_i_was_your_man_piano_chords.pdf
    • https://static.usrfiles.com/ugd/b8c837_e37f0d60dca64d2186135b4c078352fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_d25bd7c384f64513b634e0770dba64ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_05246396908f44b8971119f04f5d048c.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/oswaal_books_for_class_8_maths.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/taveravuxurafolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/participles_as_adjectives_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/31798180.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/great_tales_and_poems_of_edgar_allan_poe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/gawogiraxakojusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/nursery_daily_routine_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/value_added_tax_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/2003_road_king_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/80443357598.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_off00006cf2.bin
9b902a8ad7ca5f70b6ad957b85d2f954c879992579908bc154399c2931a5b481
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 4992 bytes
font_01_sfnt_off00007e00.bin
9c8357dd671a8f950ebe1750c0512b19eedeee8dc26ed64a1a76156e4ed07014
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E00 10640 bytes