Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eae62194a152be…

MALICIOUS

PDF

43.8 KB Created: 2020-11-02 23:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cfde2f8cf257ca9fd22a983fc59bfc98 SHA-1: 9ffa366e9f32548dcb946dc4fadf17d20cdd26c9 SHA-256: 19eae62194a152be1a6374287056c30297ef470985992749998a0e9a37c586e9
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, pointing to a phishing lure. The primary malicious URL identified is https://cctraff.ru/123?keyword=it+s+your+season+youtube. While no scripts were explicitly extracted, the PDF structure and embedded link farm suggest an attempt to drive traffic to malicious infrastructure, likely for credential harvesting or malware distribution.

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=it+s+your+season+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f967e9c1f14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f9f3dfc26ce3.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/1/0485/3966/4539/files/cwc_2020_recruitment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/26678642880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1491/2661/files/fugunuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/ina_may_gaskin_guide_to_childbirth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/statistics_chapter_11_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3660/3045/files/sojonetumozado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472edce6-1aaf-4073-bea0-4cbb94760947/first_aid_beauty_tinted_moisturizer_ivory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6221/3789/files/sms_backup_and_restore_apk_for_android_2.3.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/74892492716.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_off00006c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 4824 bytes
SHA-256: 4754b889c54c7b633f1951a31cf9e71bdfadb35bfc486cd3d9c77ea4bc682e3b
font_01_sfnt_off00007d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 11040 bytes
SHA-256: 5e7ff6c5b41da6307b4dec8240cd366c9f79903d664be663c0b082496b7313d4