Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4c1c596196a554…

MALICIOUS

PDF

35.6 KB Created: 2020-10-29 16:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2b63cf551cf3641af2ec72e51be55c5f SHA-1: c0e9ed49da2a1dee815d93d3cc4f8c50f592a5a2 SHA-256: ea4c1c596196a554866e08e767756557d20b4408238eb425c49f69ebabacaed3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically identified as a malicious redirector at 'https://ttraff.com/123?keyword=map+analysis+worksheet'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to lure the user to this malicious site. The presence of numerous other PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ttraff.com/123?keyword=map+analysis+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8fbacacb529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f8d1797ef8b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_5f9acbb40c0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f8ffd474f437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8961a6984a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5aa4605-4fe4-47b4-bceb-6bd53605695e/356559180.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/caupolican_ruben_dario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1689/files/integrated_coordinated_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affe34e2-d155-4d7b-90f7-9b20fe0eca65/bubblegum_club_wassup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2b3bf1-d2d3-441f-8c26-bf98adae9298/ginger_zee_husband.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0742/4704/files/truck_simulator_offroad_mod_apk_android_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb28900-511f-464b-9317-bb6701197e42/kuxuwinip.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFD 5168 bytes
SHA-256: 45742df8c525af0e3f1a5a4b4fb7aaf5398d202898d1a2807f3ecb31175243c8
font_01_sfnt_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 9460 bytes
SHA-256: 2b02ccdee3e8f2728e94e11289aa1900c2ea3f3273153ac6cad42765b998f699

Open this report in the interactive analyzer, or submit your own file for analysis.