Malicious PDF — malware analysis report

Static analysis result for SHA-256 fceef671693aa2e9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 02:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9af7391c9645412c7f9f2f682e52789 SHA-1: 39857eee1c4977ec9ed01edf1ee48be1420feaac SHA-256: fceef671693aa2e9727bd97bc4504d60776826581e8146700fd551f6e0dcf1c1
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which are designed to mimic SEO-friendly content, leading to a link farm. One of the primary links directs to a known malicious redirector at 'ttraff.ru', indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=racquetball+rules+pdf
    • http://files.gigstoolkit.com/uploads/1/3/0/7/130775123/31bb302fb3d61e.pdf
    • http://delet.tracyleighpottery.com/uploads/1/3/2/6/132681947/pazadowumuteg.pdf
    • http://files.tampagoldendoodle.com/uploads/1/3/1/4/131407406/vuxabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/circumference_of_a_circle_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/pure_edge_viewr.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/basic_networking_concepts_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/raputupebo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/regulaciones_aduana_cuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/java_vs_equals.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/84075111017.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/binojomilugaxagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/bemer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/word_association_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/28157437797.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/4694716618.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/xepewoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/34542383097.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e22.bin
ad9f48cb3a6342584d8445e14322b9f8f0e4b3fd633e989e88683d24a34eeefb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E22 5424 bytes
font_01_sfnt_off0000809b.bin
f50c4689b1d6508f2e0e4739b22d37f64ffd70f2ec082a59c00b216206773f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 9880 bytes

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