Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5025d197b7f4fc…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 16:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f39b21b87794ed5f4d76eb867e4e1f17 SHA-1: b0e6da6533e1756be491a8dff308163c6a78a75e SHA-256: 0d5025d197b7f4fc9dd5cb93565425f40d70fc472b2c35e65edf786dc268706e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a search query for "dream girl movie video songs". It also hosts a large number of other PDF files, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports the redirection attempt.

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.com/pify?keyword=dream+girl+movie+video+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/najadobozogupeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/starting_out_with_java_7th_edition_used.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/32509024639.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/radafasavopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/coverkids_income_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/ford_l9000_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/35788123137.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6119/files/57717100990.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_16f6a3a458dc4a1e84547624123c3c27.pdf
    • https://static.usrfiles.com/ugd/45fd81_cdfdb379f1d64de9a9de0dbc8c4cc0b0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/855-_319-_4450.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/45558628262.pdf
    • https://cdn.shopify.com/s/files/1/0465/4891/0238/files/46833852056.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/mtp_usb_device_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/xugom.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_off000047ff.bin
024c1b584599a670ccb418baad7fa95ee4b59b9f9113513bbeda8a6e462fe3ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x47FF 5204 bytes
font_01_sfnt_off000059a7.bin
34455f42a29066d95bbd080a89f48fdde5ed1b70b1b7432c162d43b8e9401175
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 9764 bytes