Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b666f34bac9afd2…

MALICIOUS

PDF

58.6 KB Created: 2020-09-10 20:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a24127eb2bd60a4ec020b47c6e3dc5a SHA-1: 60e2d76b75c8be8cad98b45ac40333ecad6fd281 SHA-256: 5b666f34bac9afd213d030686b29e6fa9770d2d1e360eed7e081b36a5af81237
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a movie download lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or redirection scheme. The document body itself contains obfuscated text and URLs, reinforcing the malicious intent.

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.club/wix?keyword=swimming+pool+full+movie++300mb
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.bigbellceramics.com/uploads/1/3/1/4/131452750/mazakewowis_kewalapila.pdf
    • http://files.shanghaitranslator-businessinterpreter-personaltourguide.com/uploads/1/3/1/1/131164393/cad7bdc86e4c9.pdf
    • http://files.marianchoraltuam.com/uploads/1/3/1/8/131871462/tivizuxinute.pdf
    • http://kotija.acct301.ehabacademy.com/uploads/1/3/0/8/130813714/bupolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/84795873976.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/format_usb_disk_allocation_unit_size.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/teletronix_la_2a.pdf
    • https://static.usrfiles.com/ugd/143c98_03a9cad639864a8da69094e61416ee25.pdf
    • https://static.usrfiles.com/ugd/857e61_e57f2559d63549b3a527361bea73c62f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/dagon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3834/files/67169153737.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_off0000a631.bin
a11613f749f9dc1b588e178ad01f415b8becb01042e1555815121d54d450cc97
pdf-font-stream PDF embedded font (sfnt) at offset 0xA631 5440 bytes
font_01_sfnt_off0000b8ce.bin
d0b5c650d3947e0feaf6412e1093b612e253272a1cc85aee3e0b5935e09e1965
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CE 10932 bytes