Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f171b870fd57ddc…

MALICIOUS

PDF

50.8 KB Created: 2020-10-29 12:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 70481c55881ef866ff8be1a0aaf6c294 SHA-1: 7433abf6c19affe6d0a9c60f4b3f4e4ca5734875 SHA-256: 3f171b870fd57ddc32249e82b52a8cfeb5ec8975eee7fa26daaa8b4186e40715
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to PDF files hosted on various platforms, which is indicative of a link farm. One of the primary links, 'https://ggtraff.ru/aws?keyword=catalog+poem+examples', is flagged as a known malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for SEO poisoning or to serve further malicious content.

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/aws?keyword=catalog+poem+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f89adc435f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f9a4455b2de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f871e5d761b4.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://cdn.shopify.com/s/files/1/0495/5232/6823/files/resident_evil_2_official_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4175/files/lerelitako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f5b2c5-f784-4816-a8a1-d105320a8097/22185379742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2758/5954/files/solobovivilukit.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/6082249575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2074/4390/files/high_performance_liquid_chromatography_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3267/7022/files/rerix.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/20th_anniversary_ideas_during_covid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/modenuvak.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/braille_alphabets_and_numbers_filetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/still_star_crossed_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfc7e97-1f6c-4276-a6bb-bc38be6c7ec1/zaxusezuwefodada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1718/3654/files/bosch_classixx_5_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6079613b-e838-42e1-a2a9-110af93f2e76/40791336210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1139/6507/files/dosuvojakajikuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4862/1987/files/samsung_galaxy_voice_recorder_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/aditya_hrudayam_in_tamil_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4558/3517/files/81109226511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a088cca-42f8-48a1-b2bf-6769c1906d0c/nuforamevinikonupuvumoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5054/8390/files/practice_worksheet_b_character_motivation_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4282/4614/files/mmm_homero_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/xorewibojojisokikaluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be46011-826b-4ebf-a026-06ad297c4831/zegubogibajakotujokejew.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_off00007cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 4768 bytes
SHA-256: 251c02be216296fb10bcc7e996c4f5eb6024d06f423d51ea89c527db0679caae
font_01_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 10044 bytes
SHA-256: c6884143fab2c77ed1c0a01e60b3f3002bff45815e382c467e8f0757262d59a1
font_02_sfnt_off0000af95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF95 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361