Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb974f316d762adf…

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 10:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc2438055c56b2660e7e8864518ed40 SHA-1: efe27d79e6658f24ae27a7eb83a2aaf667fec08f SHA-256: cb974f316d762adf43b13b9f1088c70274d3bc8a65c780a30ae0f73d7ffcc8e7
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=blockchain+basics+a+non+technical+in'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL and references to 'blockchain basics', suggesting a social engineering lure to drive clicks to malicious infrastructure.

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/wix?keyword=blockchain+basics+a+non+technical+in
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/bobukudekexotelavuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/statistical_digital_signal_processing_and_modeling.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/wallpaper_the_last_of_us.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0818/files/widipeguvasalekodoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/hungry_shark_evo_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/eyebrow_raised_emoticon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/61688903316.pdf
    • https://cdn.shopify.com/s/files/1/0468/9883/9714/files/livro_augusto_cury_voc__insubstituvel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/arabian_nights_book_of_tales.pdf
    • https://static.usrfiles.com/ugd/b8c837_236f357a6a844886b6b9d1d0f9d061e1.pdf
    • https://static.usrfiles.com/ugd/77941b_d7b7e5cd03d14c93a5a3df21cae6237d.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/fanukixelaxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/tunok.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/pojebujixim.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/sefikulepejenusipub.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/najojatusefanajemon.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_off00005389.bin
9441f71dc2d9732b64686ca1015ba843a01b5c7174c2eb8eeb2fd2b601b0858d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5389 5044 bytes
font_01_sfnt_off0000649d.bin
d159a9dc7b8bafa1c4fc638ea3a756ea58ae217c46dafd87c5428ac95b8e1129
pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 9944 bytes