Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebca2f395aa6cb02…

MALICIOUS

PDF

43.9 KB Created: 2020-10-27 16:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5b627b016cb781f024d23256d636ded0 SHA-1: 30970038df9eb5d7400e5bff6e2a5e6d9fe1031c SHA-256: ebca2f395aa6cb023b10451135420462c8c81b9c1780c66fc3f50ce9fe33b698
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on ttraff.com, which is flagged as malicious. The document also features a large number of external PDF links, suggesting an SEO link farm tactic to disguise malicious activity. The ML classifier strongly indicates maliciousness, and the embedded URL is a key indicator of the attack.

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://ttraff.com/123?keyword=john+taylor+gatto+dumbing+us+down+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8fa6f6d0f3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f94eb751321e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f95588c4ac48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8704ba7ffb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5f91eb049058d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_5f97cfb68a373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f964c9534044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5f906c8618a67.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/1/0439/2520/9256/files/wapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/violence_conjugale_belgique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6245/5191/files/julian_date_calendar_2018_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3907/files/45536968951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3284/1887/files/5543630999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/mifaxirekivumukilerel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3669/1610/files/81874921876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b1330d-8799-48b6-83dc-77d461e75f13/manual_tamper_vs_plate_compactor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1012991-beeb-462c-b906-a33ce5a41b1f/42492038259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c3b848-742e-4e02-9543-0a0589f23b05/birik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0067ce7-2dcf-429c-9d77-41fe73d4f4ff/manalepurevoror.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/tebakemikuzanivinopa.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/fekajefaverugazetasa.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/barron_s_sat_prep_29th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/voltage_divider_rule_formula.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_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5776 bytes
SHA-256: 52469f3faa66f3b66743e608b709c9b41fdb55fdff2315783510d2f2df5ca983
font_01_sfnt_off00007fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD9 10056 bytes
SHA-256: 4b4b8f9acff8ba33619b9221326d003abd25d1443e96fb3be187a205168300d6