Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef8a5cdd3e9ad82…

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 20:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a2eb2bc865fdeee183beef9794b0bd7 SHA-1: a1759c0513025fc2bb0d73f916503071493c61e8 SHA-256: aef8a5cdd3e9ad82e3165c6906c040e577d3db4a2fab40bf159e19f107c4bbcb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=calendar+2020+uk+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to lure the user to this malicious site. No scripts were extracted from this sample.

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.ru/pify?keyword=calendar+2020+uk+pdf In PDF document text
    • http://files.frauhoeckner.com/uploads/1/3/1/3/131379111/xejiresagisi-kivakubikud-tutuxazux-dufimegesobijut.pdfIn PDF document text
    • http://files.spiritedcocktailclasses.com/uploads/1/3/1/8/131856050/5838084.pdfIn PDF document text
    • http://files.greenwoodleflorehof.org/uploads/1/3/1/3/131381363/2dc4a.pdfIn PDF document text
    • http://damekofiv.floraindianadepot.org/uploads/1/3/0/7/130775432/mumel.pdfIn PDF document text
    • http://files.rmbc.edu/uploads/1/3/1/4/131454012/6980378.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/1/0433/4537/9478/files/46664884730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/sunifaruborawomoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/toro_weed_eater_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/luwile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/somanadejava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/karadiwavemalux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/wigusoritugusadabazolir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/99874395871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/nexus_minecraft_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/epilepsy_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/88828281604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/goviwofiratipibog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/1198285518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7403/4600/files/labogujuj.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_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 4860 bytes
SHA-256: f5c8b5d32cd412d05cb8e5c60cab04febbf76d119657288c250eab8a92a6ab27
font_01_sfnt_off0000726d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 10060 bytes
SHA-256: 9c645a7e768a1b8f290ebab6cf0d72af99ad48087cb68fe36e476c04048027a7
font_02_sfnt_off000094d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e