Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32fab5e4b49638d…

MALICIOUS

PDF

45.5 KB Created: 2020-11-04 15:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9508663ee0be4b48506db477e3760d40 SHA-1: 1e093b69a40992c5a1fd3da48ae76b1830f79091 SHA-256: a32fab5e4b49638d3e3cb49ef6290148617ca225dd642d862048631c3a7acbde
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ggtraff.ru'. This redirector is designed to lure users to phishing or malware distribution sites, as indicated by the heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of redirector links suggests an attempt to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=run+3+galaxy In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1571621.pdfIn PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/wadororaviwuxufulif.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/wutiwobozuwe.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/wewuxuviwar/bekiduw.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/vujosifaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf85aed-77e2-4dd8-96d3-ae3d75210e77/budano.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/irobot_roomba_550_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/lagusugasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1812/4963/files/gedapuxetif.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/terraria_latest_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/16709867919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273093ce-4aa1-44ec-ac41-48f8ba37cb92/30063044551.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/bank_clerk_exam_solved_papers_free_download.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_off000074d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D2 4920 bytes
SHA-256: eb9f189209417c4ad5af7274893c6de264a502373c167d71da3607f9f0aa4b50
font_01_sfnt_off000085bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BF 10604 bytes
SHA-256: 95b5020f1d86d3baccf0d7052e6ca4cbf9edbeb9b01fe6a010a229cba8144be3

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