Malicious PDF — malware analysis report

Static analysis result for SHA-256 725d6550bd2ee640…

MALICIOUS

PDF

48.3 KB Created: 2020-10-27 05:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 177c86249dcfe03c00ceaa7ea48fc2f1 SHA-1: 4d2a25cfaab3b9cd299fcd00d53449233237ce59 SHA-256: 725d6550bd2ee640b623147d9c4e98efc5c4ac03ce7a24b43603f2a557f35c29
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/123?keyword=sweetwater+school+district+2+lunch+menu`. This URL is likely used to lure victims into a phishing or malware distribution scheme. The document also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of 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/123?keyword=sweetwater+school+district+2+lunch+menu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f89878633e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f93bd481ed75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5f93c4951c530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f8f002ea32bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a8c69f0f8e.pdfIn PDF document text
    • https://ligotilup.weebly.com/uploads/1/3/4/3/134313371/rapatemikufan-savikujad.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/kemadifenozegi_dupovema_pukoxapexe.pdfIn PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/4d3c24568a221.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/pomukeji.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6232/4128/files/59694483277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4171/6906/files/28245813345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1219/3955/files/58772389744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/honda_ecm_2800_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/52955182323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ff5c1c-6989-4040-8d8a-75b1aa88f991/xagowepuribale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96978c41-0f9c-4722-b335-930d1115bb38/wowovikopedivulifokejulot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/ootp_perfect_team_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7081/files/zidiwusivaviwidamolujapil.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/58698624303.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/a_an_the_zero_article_worksheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 5508 bytes
SHA-256: aa771d4d242f8b24f2d3ff075d691c6427788befbeec271783f36044b0fd2217
font_01_sfnt_off00007b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 10268 bytes
SHA-256: 1f062507cf770393397fa3669b43ce9a01fec3f20d39d618575858286c2912f3
font_02_sfnt_off00009e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7E 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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