Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a6dda24a0136ad…

MALICIOUS

PDF

42.7 KB Created: 2020-10-28 01:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 173cf2447b74c2d9137755fa35db9056 SHA-1: 4bc2e74d96452e5d18473967b4068c1c489d60d1 SHA-256: 12a6dda24a0136ad983140d9855a7eda92bf7861de050e535842fd486cc7125f
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, including 'https://cctraff.ru/123?keyword=gta+v+epsilon+robes', which is flagged as malicious. The document body and embedded links suggest a phishing or scam attempt, likely using a lure related to 'Gta v epsilon robes' to entice clicks. The presence of multiple PDF links also indicates a link farm strategy.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/123?keyword=gta+v+epsilon+robes In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/b11dee01.pdfIn PDF document text
    • https://galojegada.weebly.com/uploads/1/3/4/3/134364802/bf9e35fc86.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/3935363.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/tisinavipaxogoxifex.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/buvavutafepozer.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/gowexuwobuwivi.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/tufoxofubisafopedide.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/fusegoj-xekawate-sumuxal-jerosedof.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/3a90d10d.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/108da588d8fe70.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/ruwupiwexisifi-fikaritowunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/arduino_wifi_library.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/astm_a572_grade_50_standard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6862/7384/files/novebituf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9125/6007/files/25368413001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1964/0225/files/work_from_home_jobs_fort_smith_arkansas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/fx_file_explorer_pro_apk_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2252/4326/files/slay_the_spire_defect_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/56592631089.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/aarp_membership_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/cm_ruler_actual_size.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/67920926674.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/vudulozusedudatem.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_off0000676f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 5044 bytes
SHA-256: f9356429b33aa27db5d4f45d1386c737de7cfc9c3341e92083d89560b901faf1
font_01_sfnt_off000078a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A9 10812 bytes
SHA-256: 9ca4e4b0775ac4af4c177f093510252fa1f82426a24d5636ce596e44b6e875ae