Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fbba5252f8e91d…

MALICIOUS

PDF

54.3 KB Created: 2020-09-17 20:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3056b946444031d1573fc8f2679cec31 SHA-1: 496e49003a347429ca63b7ad4aa084042da63041 SHA-256: 34fbba5252f8e91d4e5ffc8f6df34a73a751ea5f91f52d4be829925d2dea89ef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary intent is to direct users to malicious infrastructure, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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://ttraff.me/wix?keyword=drake+2b+manual
    • https://8cb3ba07-3345-40da-9eb2-93a6d2a08a98.filesusr.com/ugd/1a94e8_db009b058c37498faeaddea5153d2dbe.pdf?index=true
    • https://ae557680-b5b5-4b62-8997-2791917808cb.filesusr.com/ugd/9cb112_17bf986bde484fb0926950d5efb178da.pdf?index=true
    • https://9ed672b0-34a7-4cc7-a621-f38609d017e8.filesusr.com/ugd/9b7d8a_686be2c286424a41911b0d75f9da2b26.pdf?index=true
    • https://db4602ea-b204-46bd-a345-1db490bdb5a2.filesusr.com/ugd/80fd5d_09b36499df5f40cdbff1169cabb439b2.pdf?index=true
    • https://66da6b8b-9379-4dd3-a457-af0ecb7cb895.filesusr.com/ugd/a32c20_4992c7c481b44dd0a3eecc2b6d144f08.pdf?index=true
    • https://dd5f0d95-4545-43a4-bbd7-a679043627fe.filesusr.com/ugd/01e791_6b72986b82404323b74149f7093d39a2.pdf?index=true
    • https://9b8e3f72-b375-402f-9005-0092637732fe.filesusr.com/ugd/5aec95_ee680645975b4021a348000e3710492e.pdf?index=true
    • https://068a687f-7d59-4991-92a1-cbc4f92548d4.filesusr.com/ugd/e3c460_4ee36dc8d89346619fcd1ea6bb34a26b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/google_sheet_offline_installer.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/nuwifidimoputubififitoxab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/el_poder_de_la_kabbalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/anaphoric_and_cataphoric_reference_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/jugowefedutiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/quantitative_aptitude_for_sbi_clerk_exam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/cfa_level_1_2_3_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/phonetics_consonants_exercises.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a11.bin
e5af1d100937199e77605293ad2d308c1744b16e7f1e963a4585cd7a957282ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A11 4988 bytes
font_01_sfnt_off00009afb.bin
fb5eb52ce74af3e92df1c5bee33dc21dd80b844b0ca7f673749070a3f93c2d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFB 16000 bytes

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