Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b70aa3fdb41377…

MALICIOUS

PDF

42.8 KB Created: 2020-11-03 02:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2c7dea2226bd892c6a9c0e489d6f4bfd SHA-1: 393687665759f6c3fab6db058274a25ce9d9ed2b SHA-256: f2b70aa3fdb41377132eb66db440c08574c5cbefd91faac4fa81bfbffcad4f7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/123?keyword=epidermis+definition+medical+term', which is flagged as a malicious redirector. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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/123?keyword=epidermis+definition+medical+term In PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/7a7fd02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f90768b6f144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5f985c99ccd88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4812/4575/files/gosagunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbef2ca-1cc0-4b28-a52c-aa7f3c7a3147/wodoratif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa41b42e-baa5-4f40-aebf-e01dd9762f52/79637174809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc7a20d-c84f-4513-a86c-1e320a6a6436/maze_runner_newt_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f055793-67eb-440a-892e-e8cf72f6feba/68953500435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad37e5e2-dad2-4760-9726-dfb5ff1c7ee9/dudunikusifekarisaxomitop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e29442-431f-43b0-912c-fc9bac605c39/juguvaxej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f8c1f7-fd68-4ed8-b6e6-b0370e92339b/pazuziriguge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0759f72-91f3-4e03-a59d-608d84ed58d8/95082496865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e57ebd2-9482-437a-9bd1-ed569233c774/tegoroberumonaganar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5284864-1b3e-42bd-9a95-1ede8f214a2c/happy_dog_grooming_harrisonburg_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07fef2a-62c8-4cf8-8b97-32458dea119c/new_testament_in_aramaic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cb4991-5b38-4fc1-a6e5-e0723093c296/43604910051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/destiny_2_matchmaking_glitch.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_off0000696c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696C 5256 bytes
SHA-256: 5523347404ef8b3df5b3d2f47790ab369096812a66cd7430bc1279214e41b0ac
font_01_sfnt_off00007b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 10356 bytes
SHA-256: 167c387bd4bb29a069848bd01e0d15122b17c813c4cce80bef044c6fe58bdeea

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