Malicious PDF — malware analysis report

Static analysis result for SHA-256 d711de620439e9f6…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 03:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e4fa932c0846a4b2408f745d141560e SHA-1: 364291b74809e299d253596f507dd1c721faa488 SHA-256: d711de620439e9f6c2c4c20f019433a80d907406b83cfc568476c917cfa1dce8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=school+attendance+register+book+pdf, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the malicious intent.

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=school+attendance+register+book+pdf
    • http://gexoxeteb.dgvaluations.com.au/uploads/1/3/1/0/131070420/415313eb77dab7d.pdf
    • http://files.tactdrama.com/uploads/1/3/1/3/131398184/ddee889710029.pdf
    • http://zinaxutup.royalhouseofstyle.com/uploads/1/3/1/0/131070450/kumadodokenoka-pirapunewu.pdf
    • http://files.bucklesandbeads.com/uploads/1/3/1/3/131381031/13c4c2f77ddaa2e.pdf
    • http://bofiv.suzannegassner.com/uploads/1/3/1/3/131382243/7162881.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/1071844376.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/77981264376.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/bewogile.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/corolla_verso_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/3479384024.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/exo_atomistique.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/linux_screen_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/vetoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/32056934953.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/sijagefediz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/bevuzumavagelov.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/47676800006.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_off00005c4a.bin
ce61601509e7caef482ffb22066633adeda907fb4d0238e60c031c8f574bfa7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4A 5724 bytes
font_01_sfnt_off00006faf.bin
a673168b88d36ba79e706d381590a228f080ce8df0cd79809c023fdf60788c7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 14424 bytes