Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8c1680747d0f4c…

MALICIOUS

PDF

57.3 KB Created: 2020-08-03 12:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94197a19a3f7dedd1355ec8ee8899acc SHA-1: df59230b1bbcc94c038f46ddbea9d433356fbcac SHA-256: 8a8c1680747d0f4cb212664980d621ba61ef05e55be32dda67beb7399756eaaa
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm abuse. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=valoracion+apgar+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted, limiting further analysis of payload delivery.

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=valoracion+apgar+pdf In PDF document text
    • http://files.thepathclearer.com.au/uploads/1/3/0/7/130739258/levepidifegar.pdfIn PDF document text
    • http://files.tiafinnauthor.com/uploads/1/3/1/3/131379999/3838286.pdfIn PDF document text
    • http://files.shopicministries.com/uploads/1/3/0/7/130775085/zotaj-gedebazin.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/1/0432/0978/5512/files/vowiduxuzizebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/beroxigebejox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/warepozevuzipapomuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/learn_css_the_hard_way.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/30240868203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/61913980999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/62730331193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/kapudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/tivezafuxatamevazawubefej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/fuzawixujobigafit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/tivofoduzulum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/36777550344.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: cooriecurls.com 4 samples

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 5112 bytes
SHA-256: 20af3d5673792335b8f34938935ec17afdd206dcc08aea278a903695e75f2e44
font_01_sfnt_off0000b0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A9 12312 bytes
SHA-256: 3586f6bde598eece546683412ed68334f6712d536903af0d1704e2d84115df90

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