Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a3986bb23ae236…

MALICIOUS

PDF

37.4 KB Created: 2020-08-18 17:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c7d2088cf5eef86f1bab93b03a4504d SHA-1: 5eeb927456ef0e6e5c42af91c2fbaee960d02e44 SHA-256: c8a3986bb23ae236c391a79e26a42c44cd52fa9d39ddabba3cf4316f9ad4f601
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'tech sheet' and includes the malicious URL. This suggests a social engineering attack where the user is tricked into clicking a link that leads to malicious infrastructure. No scripts were extracted, and the primary malicious activity appears to be the redirection via the embedded 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=eternally+silenced+wine+tech+sheet In PDF document text
    • http://files.cowboys4heroes.com/uploads/1/3/2/6/132682929/11d28a05.pdfIn PDF document text
    • http://files.johncharlespennington.com/uploads/1/3/2/7/132712234/ligusaxoxu_paniv_vexapipal_pijirisinuz.pdfIn PDF document text
    • http://bedijaxo.iplacenta.eu/uploads/1/3/0/9/130969204/2002f.pdfIn PDF document text
    • http://files.pocketswine.com/uploads/1/3/1/4/131454098/8786235.pdfIn PDF document text
    • http://files.bulldogrestorationservices.com/uploads/1/3/1/8/131857565/namonekikibeworazix.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/1/0432/1817/4120/files/behind_blue_eyes_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/fanijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/pejafefepinetajufage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/battletech_painting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/92452661664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/suriwanafatufiwipekudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/all_maths_formulas_for_ssc_cgl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/xesujamopag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/cartoon_video_chhota_bheem_cartoon_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/34702189299.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: behavioralcompassgroup.com 4 samples

Related samples 8

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_off00005228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 5176 bytes
SHA-256: ccbd3fb4f7bd29890c9c487662334b76b813be84f01ee19878214c5b69156dd3
font_01_sfnt_off000063cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 10828 bytes
SHA-256: dd5bec88a8d3f2a3fcdc1cabe39b51ce77ed0df6a468a89cf081a048dbce056b

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