Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf961fa9f66c644…

MALICIOUS

PDF

62.7 KB Created: 2020-11-26 02:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dd71a071384cfd1255e5461db0f97d1d SHA-1: e5f34a24c8fd407e2af2dae47ef65c1c5fb66a56 SHA-256: aaf961fa9f66c644947727adf4f47a042f56070820221d06614593f1f1a4ae8d
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://gettraff.ru/123?utm_term=hoover+steamer+manual`. The document body, though heavily obfuscated, suggests a lure related to a 'Hoover steamer manual'. Heuristics indicate the PDF is a redirector and part of a link farm, strongly suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/123?utm_term=hoover+steamer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f9f0ef0432bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f98f184539a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8e228b7767c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f9673cf607f1.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/444186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f9451b556156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476001/normal_5fa7fa9b55655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5f9610de5e56c.pdfIn PDF document text
    • https://miwujiloj.weebly.com/uploads/1/3/4/3/134333625/nivipokuximavab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8b4d12bba61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mizeteb/dork_diaries_8_e4thai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac1714a-2309-4afd-aaa7-251b6fb323f6/xizemusanubaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd4da7-c2e4-4a4a-b238-5730e31975af/subolajisefora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4035dec-b01e-4d48-9568-2ebc326522c1/biocalculus_calculus_for_life_scienc.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/chronic_kidney_disease_guideline.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEF 4852 bytes
SHA-256: 4210b856c7a15f9c34e48cf1a0d4351b7e3b21cb384597bf1ed87825773dc1f2
font_01_sfnt_off0000cc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC57 9900 bytes
SHA-256: 9cc0446698550b6418186f89e799959246fa973ca17476a69ed0fb5dc3c618dd

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