Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c76d97cfd12766…

MALICIOUS

PDF

38.7 KB Created: 2020-11-01 02:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e7332e2978adb4449ba29c2b16be3266 SHA-1: b94e3247ad62e83be28c9bd2051c2cd5cd9a9303 SHA-256: 63c76d97cfd127665d56db683191fc477b3cb2d791e34cb651884228bedd1253
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO spam or phishing, leveraging a link farm to direct users to potentially harmful sites like ggtraff.ru.

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/123?keyword=utah+county+weather+hourly In PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/kamiv.pdfIn PDF document text
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/9867131.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/9889394.pdfIn PDF document text
    • https://gazubulurogul.weebly.com/uploads/1/3/4/4/134493330/goburul.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/29927dc9-a469-437a-9f84-bae1afc8fd6a/fotedofolikipax.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/laputeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7c6dd6-363a-456b-8a7a-a89dff015163/2011_chrysler_town_and_country_servi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc929d8-c59e-451c-952b-b3605e89d1f0/fernando_valenzuela_jersey_grey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6121/4877/files/rowexixovovexabitozepon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/mount_vernon_park_and_ride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9afc6c8-19b1-4f3f-bfe6-efb62c84896e/rulisewutopijimakipumot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42527812-aac8-49ea-96b2-5bd10776f029/jefexepatunul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1550bfc-3d1e-4953-8c76-c7e6818ee287/zuladu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7868b24c-b87d-4dec-9852-0cfd22117bcb/famebumipijudelenun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f288bf7-4fe1-4d0c-8d7f-18e6e3b27018/37870944689.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_off0000591f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 4892 bytes
SHA-256: 58d32563d3f5cfe6c105f2a076846a09c226a78d611847f0dcb262e4dbd06b18
font_01_sfnt_off000069d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 10644 bytes
SHA-256: aa753a8d426e7bb8ffb239bf00d9a4c1b36cfaad77d9517ba90efa299a03557e

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