Malicious PDF — malware analysis report

Static analysis result for SHA-256 0386a47048c66285…

MALICIOUS

PDF

72.6 KB Created: 2020-11-25 18:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0e357c26edae743c4f3dabfc534e7974 SHA-1: 71a2b35a7cd790edc67a309dea362e2189659338 SHA-256: 0386a47048c66285aa4274feab9562eb9313a25237d2a9bddf5f60316c7dbb8b
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'traffine.ru'. The document body, though heavily obfuscated, contains text related to 'Kenmore 800 series washer troubleshooting', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=kenmore+800+series+washer+troubleshooting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420911/normal_5fa587fc2c422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f8f258111be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f905b78298aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5fb75b1db98e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5fb327cf744f4.pdfIn PDF document text
    • https://tofesasezi.weebly.com/uploads/1/3/4/7/134730688/fuwug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5f91eb0f8779c.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/410830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_5fba3a3d86641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1c9bf673-f37c-4f14-a892-accffc14776d/dovepuximufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7cb4ab-7d60-4333-a04f-5a21659ed1d5/koperopifilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b20275-262a-47c6-9ef7-52212af126d0/93520690359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd285984-334c-444d-8045-59ccc569f338/everything_ravaged_everything_burned_short_story.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 5520 bytes
SHA-256: c42b5a26751791fb557d096aced88bab5849a830a9497c1e23724d645fbade0c
font_01_sfnt_off0000e364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 10412 bytes
SHA-256: 4cbc1688bc090276990784001d8d8fc82832d72879cc0c38cfbeb776d075d726
font_02_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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