Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6da4ad4e0b3488c…

MALICIOUS

PDF

52.1 KB Created: 2020-10-25 08:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d9c9e25dc77038e3be41ab03b2e209d3 SHA-1: 382ebd013a7d8fd591deea06c924887c5ba59cd2 SHA-256: e6da4ad4e0b3488ce58816ef5552161b4480198ddb8407acccf7aff2f810a463
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 of which point to a link farm hosted on weebly.com, suggesting a SEO poisoning or spamming campaign. One of the initial links, 'https://ttraff.link/123?keyword=budget+pc+build+guide+2020', redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence score support the malicious verdict.

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.link/123?keyword=budget+pc+build+guide+2020 In PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/newiravuwavuli_powuzewukanelo.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/5471a811b.pdfIn PDF document text
    • https://warobakun.weebly.com/uploads/1/3/4/4/134486798/4ce53cba341d8.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/558f72942e7b60c.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/0f749d95.pdfIn PDF document text
    • https://xogotosab.weebly.com/uploads/1/3/4/3/134327909/rodegapiluwurokus.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/jewakupudize.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/5021560.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/vimewixepuragegimuk.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/ee4d089e4608c.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/vekukifoluwupowone.pdfIn PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/jemuxiguxa_sikuwavipis_xazema.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/1/0496/5010/6532/files/neopets_brain_tree_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3018/4601/files/72974093960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8602/7188/files/lzumsuz_bilgiler_ansiklopedisi_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/bujowisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e18560d-c1e2-43c2-abb9-0ea6734d99e9/widorijomubilorofijume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323f611c-14a6-4661-879e-7812d5d66dc6/5212167219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e639599b-bf3d-4045-a808-e796acd4ffb1/3756950320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/niseko_guided_ski_tours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7591/1847/files/bugejepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/spanish_baseball_player_died_in_plane_crash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3319/8498/files/cool_earrings_for_men.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/27641443457.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000776c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 5220 bytes
SHA-256: 48c64e430df42e24ac515760d9ce61d65bfed8af6823c75f5ca06e5fc1254021
font_01_sfnt_off00008949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8949 10684 bytes
SHA-256: d769dfb457f66709174e6fca071fd5b4bd43fddb319544eaaf83d753eb23091f
font_02_sfnt_off0000adcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCB 16060 bytes
SHA-256: 3a2bb6651a5ad642813d1e324805fe83a688734d44fd23e014c0665a2602df32