Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c2549c989a5964…

MALICIOUS

PDF

48.7 KB Created: 2020-11-02 17:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 083033b329102f78c853a1af7f126c75 SHA-1: ece53cc7847cb10ecbe32d8b086b55289a0f4a07 SHA-256: f1c2549c989a596447209bd7c6e318ef770868723cb371ddebee97cd3759b772
194 Risk Score

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.me/123?keyword=saint+dorothy+church+youtube In PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/kedagokuvebomo.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/wupozowefunalenem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9dc41dbfe1f.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/2096477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f903e78bdeb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1605/5715/files/converting_percentages_to_fractions_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/9751/0829/files/91238591432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3303/2371/files/juzegejeroxinuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9772/1506/files/oregon_drivers_license_renewal_fee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5623/4140/files/zalanimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7611/9453/files/17227069223.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 5044 bytes
SHA-256: a8bb0851e672fb41210fc6f833fdef809a64dee0cb57e8761d2fbf726a4676b2
font_01_sfnt_off000080e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 11880 bytes
SHA-256: 825e0576123d46b296cff23373e2dd52209c26f9a1713d0bc89785fe687b61ff
font_02_sfnt_off0000a7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3