Malicious PDF — malware analysis report

Static analysis result for SHA-256 856458cf81fd9a07…

MALICIOUS

PDF

57.2 KB Created: 2020-08-08 17:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff215e731cf91ea740836d12f13d19d0 SHA-1: 2d59360fb1806b678a4751a60618f56dccf80f7c SHA-256: 856458cf81fd9a07f3fc231060870b0805970155f9f24e508c04713fb53525a0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary link pointing to a known malicious redirector. This redirector is likely used to obscure the final malicious destination, which could be a phishing page or a malware download. The document body and metadata suggest a lure related to 'bonbon cakery recipes pdf', which is likely a pretext to entice users to click the malicious link.

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/pify?keyword=bonbon+cakery+recipes+pdf In PDF document text
    • http://files.twolazylittledogs.com/uploads/1/3/1/4/131483029/9cdee27.pdfIn PDF document text
    • http://files.africaspectrum.com/uploads/1/3/0/8/130874295/2259724.pdfIn PDF document text
    • http://files.cambridgerugcleaning.com/uploads/1/3/0/7/130776536/8770450.pdfIn PDF document text
    • http://files.lpdcllc.com/uploads/1/3/0/7/130740318/4201149.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/1/0432/0110/1985/files/34585262764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/jipalutuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/how_much_is_mark_knopfler_worth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/44874894559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/job_order_costing_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/annihilation_vandermeer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/nelson_mandela_long_walk_to_freedom_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/rivemenobuwivifiribu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/gcss_army_smart_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/lidukudejiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1801/0274/files/20814597009.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
🗂 Part of campaign: heatherdexter.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 5180 bytes
SHA-256: 8d9e096cbb4b9d0b6f0476e5ca1bc4e86f25926d3eaa51da148fca48e8874907
font_01_sfnt_off00009b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4B 14980 bytes
SHA-256: e7c55185320dbd7c6b6aab371ce2548dd5b894d27de98433482205a5fa551141
font_02_sfnt_off0000c9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333