Malicious PDF — malware analysis report

Static analysis result for SHA-256 330fd64fee1d3b69…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 02:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7f9192d3be492fcc0d968003e267792 SHA-1: a89f209c6ab830ceb6fffe8b75aad838dfb19c90 SHA-256: 330fd64fee1d3b690f91c577a4b8656386f46c1ed693873c8701041eadd65b82
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same keyword used in the redirector URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=buxton+secondary+school+uniform+shop
    • http://xofakuj.seanoneillartist.com/uploads/1/3/1/4/131406893/4119974.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/rifudokofuzesumipiwowagek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nuxunaninuzuralij.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/18871637790.pdf
    • https://cdn.shopify.com/s/files/1/0431/8668/4068/files/58737940556.pdf
    • https://cdn.shopify.com/s/files/1/0452/6519/1073/files/25563827138.pdf
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/freaky_friday_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0451/8608/9109/files/12064127168.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/davalulilure.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/56955600187.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/4_hour_drug_and_alcohol_course_answers.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_off00004fd2.bin
8dbb25503eacb9245a759afbc8bb9140fc9131d80a8db8ad09a681a191e41eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD2 5616 bytes
font_01_sfnt_off000062d1.bin
2470a697580ab74bd1ec3727196927cf0d28718a6e5167cf35d87a55f5ab1461
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 10184 bytes