Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd299e78c5d6375…

MALICIOUS

PDF

118.4 KB Created: 2020-10-18 06:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 835b2e04cbc9b653c1bf991c77dfcad1 SHA-1: 75a22d061592c9e6f09892add6b3e94895cda471 SHA-256: 3dd299e78c5d637570b5eef2a53a4b16e1d6496b42ecb5fee67b4631b7080219
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors. One such redirector URL is https://gettraff.ru/123?keyword=scorn+game+apk+download, which is flagged as malicious. This suggests the document is part of a link farm designed to drive traffic to potentially harmful content, likely related to app downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?keyword=scorn+game+apk+download In PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/lavevumuxeb.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/jemig.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/rijeseka.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/podufolagevonu_moxedogepulakus_rutapud.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/b5b46ffb5.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/fifolaketobufa-digopogoxen-jimamawamuge.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/deruramewobutevitaw.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/runavalekuluz.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/kozax-bineve.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.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/961d65c5-68b0-403f-9a03-a4cb83fe7006/saxagukuzuxuziku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c70e8f-89d4-4625-8dea-0078c1366383/35828845482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ea1118-e0ab-4277-b7b9-cf8a776525ae/nelikabetivetovoxatula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c27153-40df-4a74-88fb-688dfec5dd74/faxupijen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9152c4fb-be7b-4826-a040-3d11fe3fc6c9/jefisabubawalepojan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffc2700-2b7b-4047-bad9-7f06154dad1a/89005472277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cd3f61-2474-4648-96f7-ffbebbed399c/90515070686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4e626c-1c6a-4c23-8e15-48723c944e89/nodazegusavivitod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b38e3d4-ad71-4fac-8367-61725a01b9ca/kingdom_hearts_psp_iso.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_off0001934e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1934E 5476 bytes
SHA-256: 27b839380ef826d008d9910821b8e3577376e8654488eb62400023cb2d9712bf
font_01_sfnt_off0001a5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5D9 11032 bytes
SHA-256: 41e14064bfd05e26cc1e199443a6153ae67808e81b43cd203ea04cb43e4137a5