Malicious PDF — malware analysis report

Static analysis result for SHA-256 e047bddd049d1b70…

MALICIOUS

PDF

62.6 KB Created: 2020-11-25 23:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038a5a1d2f27e478735d4b02779ac5c2 SHA-1: 533d54c34d6bd691a977773c128010d1193b37f9 SHA-256: e047bddd049d1b7025a72ee7c0e5cdb39e2564d7f22f31cc23e2a03f928b1ace
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for redirecting to known malicious infrastructure. The embedded links, such as 'https://traffmen.ru/123?utm_term=the+unfinished+nation+7th+edition+study+guide+answer+key', are likely intended to lead users to phishing sites or download further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=the+unfinished+nation+7th+edition+study+guide+answer+key
    • https://cdn-cms.f-static.net/uploads/4490273/normal_5fb593bdc4bb6.pdf
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6384478.pdf
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5fa5dacb52537.pdf
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/6752030.pdf
    • https://gupolapi.weebly.com/uploads/1/3/4/6/134629895/zadolorarozusodi.pdf
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5f930bdba1ff6.pdf
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/gujarutubadaza_sotafif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c7bf2edd-1f93-4da4-954a-c33836785964/aptoide_tv_apk_for_tv.pdf
    • https://uploads.strikinglycdn.com/files/a4691ddd-8665-483b-87c6-ee00d723ea49/lolonugedituwixelux.pdf
    • https://uploads.strikinglycdn.com/files/ee79e177-57ed-44dc-a7f1-4c6f2022d68b/83253924170.pdf
    • https://uploads.strikinglycdn.com/files/537b71d4-e103-404b-b55a-4ccdc1c7291a/kedipotezafulad.pdf
    • https://uploads.strikinglycdn.com/files/24f795a5-eb20-4ec4-8841-ca1588e3c67f/bixelemexu.pdf
    • https://uploads.strikinglycdn.com/files/fe47d235-edb1-4b6b-8f97-32653b1f1109/sesiwar.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_off0000b827.bin
37ed0f43b89a793c6908129082b4e498b0cd64c81c11e60aa272da0199136f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB827 5424 bytes
font_01_sfnt_off0000cab8.bin
bd831be7d1892eacb674de59cdbd858e920b19f68f8c097f04663a65a282b644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB8 10192 bytes

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