Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa6cab92641bf42…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 01:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1637fba52090cdf07a1cfe989952afc SHA-1: 53635a9b9811b299e967c6e9e075dc78793e197c SHA-256: aaa6cab92641bf42a3509fe66e825ac1d4bf1acee4ed1b4d9b236a9721eb40f0
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=emphysematous+pyelonephritis+case+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The presence of a 'Password-protected archive handoff' heuristic suggests the document is intended to trick the user into downloading a password-protected file, likely containing a malicious payload, after navigating through the redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=emphysematous+pyelonephritis+case+report
    • http://rudojogex.inscience242.com/uploads/1/3/0/7/130740257/ace0df.pdf
    • http://files.thebodyboutiquebykatie.com/uploads/1/3/2/6/132682030/diwagimiranule.pdf
    • http://files.modson.com/uploads/1/3/1/4/131438079/sarox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/2459904718.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/wegidikuwideligaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/36693860801.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/47803875299.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/lobimes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/62372898604.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/galbraith_affluent_society.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/56803407424.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/t_pain_chopped_and_srewed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/music_notes_on_staff.pdf
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/peludomokigepituva.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/basic_ms_office_course.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_off0000699d.bin
d477829e62a2c68ad31d85ac08874c9daa6ba4bf3bbee5ea0384d7632e898fdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x699D 5232 bytes
font_01_sfnt_off00007b43.bin
97f9b01a116e3823e26dd890b7448a18f5a7cc752360078e7d7173a56acd665e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B43 15500 bytes