Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7cf1157dfe4dc7…

MALICIOUS

PDF

38.7 KB Created: 2020-11-02 08:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b3c7c7734ff8dd56bf5dc624863bcf4b SHA-1: 00d3b963e37a3e3c7fae59246f86dcd4828f7693 SHA-256: 8d7cf1157dfe4dc7fdbb9c85c62a5242feca6469ab151ac562898693486a41de
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to payment redirection, instructing the user to update bank details. It embeds a link to a known malicious redirector, https://cctraff.ru/strik?keyword=delta+science+kits, which is likely used to deliver a secondary payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://cctraff.ru/strik?keyword=delta+science+kits In 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/1/0430/3441/1157/files/tuwedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7782/1107/files/stress_management_for_life_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/the_cartoon_guide_to_calculus_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/patokibefibaludegusune.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/best_reader_for_windows_10_64_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7093/0075/files/tormenta_rpg_bestiario_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/46580463304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7744/4790/files/trf_avid_tutorial_forms_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0540/0990/files/xinumisulifoposi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7830/0862/files/craigslist_minneapolis_minnesota_furniture_for_sale_by_owner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36478c3e-fba1-4c61-b3ba-35b845fa6979/fipazelega.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/muzupuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8575/0976/files/mahatma_gandhi_short_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5272/7972/files/51480151126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73991067-dfe6-44be-98a0-50c1c302d74f/31281942963.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/3912147111.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x542F 4760 bytes
SHA-256: 8c2d788e57e7c4c79b39e14c39b68894c2469a7204805c2fbee1f05f9fdcf2e2
font_01_sfnt_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 11964 bytes
SHA-256: 84ea66f7343694d69572114d66ec3114815a171d0eb768f2f66e0ef1fac43834

Open this report in the interactive analyzer, or submit your own file for analysis.