Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcceb59ac724304b…

MALICIOUS

PDF

36.1 KB Created: 2020-08-17 02:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e166bfa5525ad30dc5e42ad65a8f5409 SHA-1: 42db85eee8cc09618afb4bed31756737c61821c3 SHA-256: dcceb59ac724304b5b8e551b77ac1e0c2c98b505c5ba943ae699f437e3a8e30a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a redirector at ttraff.ru. This indicates a phishing or malicious redirection attempt, likely to distribute further malware or lead users to scam pages. The document body contains keywords related to educational topics, suggesting a lure to trick users into clicking the malicious links.

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.ru/pify?keyword=edgenuity+topic+test+answers+geometry
    • http://files.nomsieswoodcrafts.com/uploads/1/3/0/8/130874328/22974.pdf
    • http://files.integrityhouseinspections.com/uploads/1/3/1/8/131856161/tamazosinerex-fusosuro.pdf
    • http://files.metzteaching.com/uploads/1/3/1/6/131607163/muginar.pdf
    • http://files.bakeitsg.com/uploads/1/3/1/8/131857465/lezebazosajut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/64106136538.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/botajuzowikulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/augmented_reality_android_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/musoxokozuditixokifixexaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0955/files/kabbalah_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/85006163428.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_off00004c54.bin
1acc11ed0e4813c6dd8acbacead4e25adeceb26df33473e0570d41e9d6e7a4f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C54 5512 bytes
font_01_sfnt_off00005f1b.bin
7855af2afbfb8d650e27f3e7976e547e668c341b1600a39f2ed49f192e328287
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 10000 bytes