Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf296aad89c49d0…

MALICIOUS

PDF

49.6 KB Created: 2020-10-26 11:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9c74edf4f33b33ccb3e0dda7cfc102a6 SHA-1: 17aebeba486d4493cd33ef1ef95efd84e22e240a SHA-256: ecf296aad89c49d0d898692bf96b4a776d67d3d556bc13c4d230c8c05d95e2e2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a link to an academic PDF. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and numerous other URLs, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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/wb?keyword=contemporary%20industrial%20organization%20a%20quantitative%20approach%20pdf In 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/83613d6d-9adc-44c0-9d8b-27f04b7f03b7/308488710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15487d7-c68a-4ec7-a589-bc115dc6e979/85057452276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea7d2d6-8df9-48ee-9da8-69f3706a9c63/erin_brockovich_movie_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47f4a03-bd54-4a7c-9e2d-91d1beedabff/40012751074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14cd14b-5473-4532-a150-52a12e2c941a/82444701130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/78946853095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/miwekenenuxolivojoriwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/cant_install_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/dakupum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/tijerukukizoxodale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02962fa2-b1c7-460f-b069-33c013efc3a0/vanuvekekenaniwizumawosed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20dde26-6ed7-4fcb-9397-27107ff106a4/58177130877.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/cds_2019_english_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/russian_revolution_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/nokizire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914c6063-0cc5-497c-ae10-664dedad8475/46705224868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942213ed-8634-4cf8-8727-af6068009200/40560581150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5b3c17-ecdc-4fd3-899d-d96b4522ef83/petijagumodevogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df929ea3-fac6-4002-bdd4-ceeee2d047fc/veleboxafarobanesid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f2c3d1-3f02-44e8-8846-374fa8f4c8eb/20084008039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98e54cd-c346-4008-9c47-2e88d99a47ff/iso_14001_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219cce49-2908-44c9-8945-fae30559ba3e/napujexavar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f067a6-3388-4260-83d7-01a9d8b8474b/soundlogic_xt_2200mah_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391b4613-9350-4722-8c58-e17890673d73/easeus_data_recovery_wizard_trial_license_code.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_off0000735a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 3616 bytes
SHA-256: 89c30635b053740814bfc32c860a6eda1cb29fe3b70c48f03f7bca7a098bdf8b
font_01_sfnt_off0000801f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801F 5812 bytes
SHA-256: 06bf247eef802f68ac8d308550c291a224ce7bd5fe764c005b483f1af4d1963d
font_02_sfnt_off000093c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C0 10748 bytes
SHA-256: 7e2e49b60fb1f16392cc696635eb336e614e7cbb67a03a6a2e283cc233e1c95d