Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9f8ed29fab291f…

MALICIOUS

PDF

40.1 KB Created: 2020-09-16 16:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdad6a80f7dfb444f3d8cc662a892180 SHA-1: 2f97b352c16a02f25491ee9436ef805a697a2b43 SHA-256: 2b9f8ed29fab291fbd851d730744bcc175fbd4c8963fe5ba6104d9a7c2591882
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded document body text, though partially corrupted, contains a URL that matches the redirector link found in the heuristics. This suggests the document's primary purpose is to lure users to malicious sites by presenting a large number of 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.club/wix?keyword=better+vampires+not+using+bv+scripts
    • http://bijoret.empowereddecisions.us/uploads/1/3/1/1/131163992/zogelodoge.pdf
    • http://files.wellesleyhistory.org/uploads/1/3/1/8/131872238/2019335.pdf
    • http://vakegi.mooneycooleydance.com/uploads/1/3/2/6/132681268/tufebazolisug-nafinateban-masekesulimu-ximidugogav.pdf
    • http://bifoki.pizzatomatecr.com/uploads/1/3/2/3/132303382/5675946.pdf
    • http://files.bantamleague.com/uploads/1/3/1/0/131070588/294020d9762a.pdf
    • http://lezijovi.riverstonegallery.net/uploads/1/3/2/7/132740718/25a14d.pdf
    • http://files.tradeforward.com.au/uploads/1/3/1/4/131437322/4648567.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/28131010004.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/lolonovoxaras.pdf
    • https://cdn.shopify.com/s/files/1/0450/3171/9070/files/ashampoo_free_vs_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/saxawufirazonosoledalapuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/former_capital_of_japan_crossword_clue.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/tuzonukoloxuka.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8881/files/a_league_tv_guide_for_tonight.pdf
    • https://cdn.shopify.com/s/files/1/0441/2653/5832/files/comptia_security_study_guide_exam_sy0-_501.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_off00005f8a.bin
1dffe5dd2ba25577b17c1493860fee1bbafe50d6e4f7c86e0799e9cba4cb46a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 5468 bytes
font_01_sfnt_off00007217.bin
5813a933555e1222a4f06dc7b7297ef9515bf0dcbbce787f0b97ef350be36a52
pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 9832 bytes