Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e99a54e127255c…

MALICIOUS

PDF

60.8 KB Created: 2020-11-01 21:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aea9019c8dc81de348fef35263c3b276 SHA-1: 77c478e6eec3b30eb67f0b7687a952c733d5b460 SHA-256: e4e99a54e127255c2b8d5c6034ac7c4efcf171222c9f865a9697552c4942b852
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous links, many of which point to redirector infrastructure. The primary redirector URL, https://ggtraff.ru/aws?keyword=etrian+odyssey+nexus+guild+card, is associated with malicious activity. The document's structure and embedded links suggest a phishing or scam attempt, likely aiming to trick users into downloading further malicious content or visiting compromised websites. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ggtraff.ru/aws?keyword=etrian+odyssey+nexus+guild+card In PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/pizumuxifodiro.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8f27ccc774f.pdfIn PDF document text
    • http://www.opentle.orgIn 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/1/0435/3985/7563/files/2_way_relative_frequency_table_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7781/8269/files/ninumotubakisugulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6079e2b2-2d1d-4f97-a383-b4896e0fa204/bouncing_gift_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/what_are_the_3_types_of_text_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1adee40-55f8-4bde-8078-7089e6ec3140/40247902553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2570/9211/files/tefukidesewubid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/voice_recognition_android_app_source_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6993/4230/files/newaxiwabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a304058-ea2a-4ff4-a148-71547787eb5c/enrich_fossils_answer_key.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00009b82.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B82 12900 bytes
SHA-256: 83223624db66f984d8ce77fb69dfc14a6893316bc380eb70cb11e06eea625363
font_00_sfnt_off0000899f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899F 5232 bytes
SHA-256: 5e737ff7fa0aeccfc92f9856a1528c29ca0da133589d3db44e731b65877c5c6f
font_02_sfnt_off0000bf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4D 11484 bytes
SHA-256: 36cab02513d4c4cc3992cd2b454b4ee7afc3cf904645cc5b1162d36d3cc7a109

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