Malicious PDF — malware analysis report

Static analysis result for SHA-256 1311bc6dea0aa5b8…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 04:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a010021a6f005c8840dbbc5c7f2c9ad SHA-1: d46c134aa41296e5b7a9e432422d7b0c52850b1e SHA-256: 1311bc6dea0aa5b82a7e68ff62815dbb0b7ab05803928fbad2083b13172958d2
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a song download. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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/wix?keyword=download+mp3+oyi+by+2face+idibia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/10e3af_1ba92555bd6f4fbe9bcf98a5cfcfcfc4.pdf
    • https://static.usrfiles.com/ugd/b5472a_27e5a8b973114c2a97949cd5be7a0de5.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_9dda820f57224b82a58056d20d75361c.pdf
    • https://static.usrfiles.com/ugd/bfbc46_bf7b2416cf784ad08d785647d9775cbe.pdf
    • https://static.usrfiles.com/ugd/a4e402_47cf652164424b4c80a8ea9cfe115ccc.pdf
    • https://static.usrfiles.com/ugd/b9801a_e49fb2dd0239471480fbc31b3c8682cb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0274/files/ateten_gmlek_tahlil.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/ponaxedol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/peludugevevupinodipebobep.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/tipping_tour_guides_in_russia.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/miracles_happen_brian_weiss_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/abo_blood_type.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6488/files/kakezo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b8a.bin
6d380cc57ee23fd86947b3aea4e9e8bd4de62ec540ae5ac636d3d90ca617888c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8A 5364 bytes
font_01_sfnt_off00005dca.bin
7653765bd51002d6094b9236e61a588bc005d073cf92d5b86086dc0fd86adfa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCA 10864 bytes
font_02_sfnt_off00008226.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 4324 bytes