Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcedda35ddd3c4d8…

MALICIOUS

PDF

55.5 KB Created: 2020-10-02 05:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2425534d40570075085e8fefb43029a0 SHA-1: 34389f132a8ad52659caf19d7d1b9738c3cf78f0 SHA-256: fcedda35ddd3c4d80515f2dca57c4810880f516f8dd5b8402685f1dda3e5ddd7
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying one that redirects to the known malicious domain 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to this URL, suggesting an attempt to direct users to malicious content. The presence of multiple links hosted on disposable domains further supports a link farm or phishing lure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=lactobacillus+casei+gram+stain In PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/ziluvuvekamigojuzakosa.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/wumumawan.pdfIn PDF document text
    • https://site-1041075.mozfiles.com/files/1041075/95105780891.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/20606326546.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/17191795376.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/kavaxiwitovajutod.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/surelibiritojimun.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/df1893a3-b239-423d-b4a1-422ecbb26bdd/bakezuwuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7d6727-ad8f-4fdf-88a8-e86f35f22011/7869708195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d584365a-f070-4c94-96f9-889d1e6b3cf8/72119542324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb5d5b5-bd23-44c8-ac6b-5323f7869626/lorimemikeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd329d7-dd52-4f41-9e04-0f241c54382b/32902690825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a636ba0e-2b7c-4c95-9ab0-852f6cdb66be/21800260133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a814a725-87aa-4e85-a6b8-5bf063890fae/fonozus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa221a5b-d9bd-4b8b-b852-bfd2548e1735/90455940580.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_off00009b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B37 5200 bytes
SHA-256: 501b03b0b46072d23f1ca7fc7dfc43e7b1960c2d77b0bc269464c04ef6f9ad14
font_01_sfnt_off0000acd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD3 10768 bytes
SHA-256: 542bfda3f25f12435bd0533d1667f598ce029a07d4dc2b1f62176291f127ac4f

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