Malicious PDF — malware analysis report

Static analysis result for SHA-256 050cfdb11dab5016…

MALICIOUS

PDF

43.5 KB Created: 2020-09-07 03:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48c6a4ed226e8a984aae84cd53e928e8 SHA-1: 4d57a05dc4c58cd34a150424052962de052528c2 SHA-256: 050cfdb11dab5016b02f4646658303217eb619bb49cdbd4ee34b271332dc1980
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector link farm. The primary malicious URL, 'https://ttraff.club/wix?keyword=devexpress+report+change+datasource', is designed to redirect users. While many other links point to benign Shopify domains, the presence of the malicious redirector and the ML classifier's high confidence score suggest a malicious intent to lead users to harmful content.

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=devexpress+report+change+datasource
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/baby_i_don_t_know_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/69247666512.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/apa_format_example_peer_reviewed_article.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/576534121.pdf
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/sunquest_pro_24rs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/gojamipigoropa.pdf
    • https://static.usrfiles.com/ugd/ab059d_02d004359fa74ac88c6d9063fc102b04.pdf
    • https://static.usrfiles.com/ugd/35e1ce_60f8927a48954b01b24adb2f870c4eed.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/ima_statement_of_ethical_professional_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/laboratory_report_31_smell_and_taste.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_off000065c2.bin
b35e7c39a7dbfa6a776cbd8b6dc16eacba4bc03b52ea9bbe89505106f8b4f068
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 5432 bytes
font_01_sfnt_off00007846.bin
9a7649d5d83ec7f69d2a693b327b1498c52035535517fcf0634ec9fd988fd9fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7846 12960 bytes