Malicious PDF — malware analysis report

Static analysis result for SHA-256 5548c232b1e7c4a7…

MALICIOUS

PDF

57.8 KB Created: 2020-10-25 10:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2e33459084a257ebd7a47bb2c3690b6f SHA-1: 9631e36d2f4db283755d0623cf236f81896f8af1 SHA-256: 5548c232b1e7c4a7e10e1bfb00572b738a27163cf979ebcd1105444d87b5743f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The embedded URL points to a redirector that likely leads to a phishing or malware distribution site.

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.club/pify?keyword=lumen+gentium+summary+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f927d448d355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f8bf31a71c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8d6a5459825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f95168c5f189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f888b23a44cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f900c1f336b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f90473435980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2cd270f7-1e50-4be2-bca3-73274dd3a348/lidotizatinalezavoboku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334bf8a1-32a3-4cd7-9d33-543282742a99/92201585306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19662dad-f30d-408c-85be-409ded379459/niriwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff9986e-bc29-474c-82ae-e2a28deaa26d/14344056639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/desert_storm_basketball_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/android_intent_sample_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48578554-8686-479e-84e7-8821736d38d3/behringer_1204usb_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4143f6fd-1cb9-4108-b024-dd16e79ad82c/79935730880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61472980-abf4-43fc-9f1d-ec66ac43c14b/2852945066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee36dac2-245c-452b-b114-e873c574e64f/bigob.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/41911910605.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/35631645860.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/gulma_ageratum_conyzoides.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_off0000983d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983D 5144 bytes
SHA-256: 8c0a3fa742a90e1f7ff25b61802bc46075462a7587cb403c508f006d595a7343
font_01_sfnt_off0000a9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A4 9896 bytes
SHA-256: 3ffabfb1c7d3d0aec2fcfb9bce2a6b98fee89c6cf03c85c77fa712b6ca99e75a
font_02_sfnt_off0000cb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB95 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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