Malicious PDF — malware analysis report

Static analysis result for SHA-256 312e699e0d4acd20…

MALICIOUS

PDF

120.5 KB Created: 2020-11-07 21:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4bee1dca2da033450d0783527347b764 SHA-1: e3645a97a0bc9968b5719f96aaae493fc71a45eb SHA-256: 312e699e0d4acd20314123762af28ddd32c238b0a63db386e8880443f9087b44
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying it as a malicious redirector link farm. The primary URL, 'https://ggtraff.ru/aws?keyword=e-v13+dna+project', is flagged as malicious. The document's structure and the high number of external links suggest an attempt to manipulate search engine results or direct users to malicious content, aligning with spearphishing tactics.

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.
  • 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.
  • 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=e-v13+dna+project In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f9659c948f0f.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/1115681.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/jomamusenaxitejipad.pdfIn PDF document text
    • https://razisosip.weebly.com/uploads/1/3/0/7/130739291/c9d3d9d7d9d67b.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/kinofavokonokaxulavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9e839f88684.pdfIn PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/guzakevaped-dodaxu-turuzaz.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/8d8e0875-6bd9-4991-824e-153d9c9fda80/femukezozatufasado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401e5f66-b02a-44b9-83ed-b9b6e25e9a26/63298510711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52415c49-9ec0-47da-a23a-50fb71130b69/wugagorusadefupusasedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f41586-30db-47d2-8cb5-e31a05e1bede/sample_letter_to_uscis_for_name_correction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35af7f0-836e-4bee-895d-6209f5a3d1b6/31712884001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42af50f4-db08-41a6-a82c-77260aa74da2/56874292988.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FD 20724 bytes
SHA-256: 3108989a1d5c3c85fa9390f346dab275f18b700d10b78e0366b05003b82fc16a
font_01_sfnt_off000198f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198F9 5200 bytes
SHA-256: a838d1c7d09dfeef1268f00a873919d2415dc0af49878075d3eae4928537b66a
font_02_sfnt_off0001aad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAD9 12356 bytes
SHA-256: d926dab7fab165c85dbb3b2ea0ecc6f1019e52db9910442f4b662ad83faf31c7

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