Malicious PDF — malware analysis report

Static analysis result for SHA-256 033520c2eb80caa0…

MALICIOUS

PDF

33.6 KB Created: 2020-08-22 02:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d59552f1f92a1679c8f1dd81737e01 SHA-1: 8ee570cc751897509301df4e7dc7ab555e7e8178 SHA-256: 033520c2eb80caa0342c3cf14788d3e3f89cf967b750ff7664debf2bac09b7df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=aladdin+arabian+nights+piano+sheet+music`. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify PDF links, suggesting a coordinated effort to drive traffic through these links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aladdin+arabian+nights+piano+sheet+music
    • http://files.reisbordsclass.com/uploads/1/3/1/3/131379530/divogotugonuvek-numixefuxit.pdf
    • http://files.ravenhillbotanicals.com/uploads/1/3/1/1/131163832/zikuvabowik-benesowetafuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pozopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/porsche_design_pens_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/caddyshack_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/88751313845.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/gobekativilazov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/bash_shell_scripting_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0438/2228/4960/files/spectrum_tv_guide_myrtle_beach.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/bhagavad_gita_slokas_in_english_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/6499864918.pdf
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/4513503459.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000450f.bin
28c1873b822fca98784f913e3ab5cc5aefb487455c5e61555ad0083d240f4273
pdf-font-stream PDF embedded font (sfnt) at offset 0x450F 5616 bytes
font_01_sfnt_off000057e8.bin
ed72e568380e4559d0f943fbe30b255d98d793a10332414a83e237fb7e126f38
pdf-font-stream PDF embedded font (sfnt) at offset 0x57E8 9976 bytes