Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82a3d39b4d364f2…

MALICIOUS

PDF

37.7 KB Created: 2020-08-15 04:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f81f14044e48595b2bd66cdc0b4eae1 SHA-1: 6177eefe3684a15aa65db23ec17b989ffaa3f554 SHA-256: c82a3d39b4d364f267d4052c5fe9e9b83ebae6eb6f39cc95be5bdee471fd02b6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. This redirector is likely used to obscure the final destination, which could be a phishing page or a malware download. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of a link farm further suggests an attempt to manipulate search engine results for malicious purposes.

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/wb?keyword=campbell%20biology%20test%20bank%20pdf%20free In PDF document text
    • http://lugipujef.studioprbozeman.com/uploads/1/3/1/4/131454165/tofiri_gukojosat_jupenazipisile.pdfIn PDF document text
    • http://files.cdestinydesigns.com/uploads/1/3/1/3/131379948/7fd0ad71e18491.pdfIn PDF document text
    • http://files.gswcs.com/uploads/1/3/2/3/132303205/dulinijurojidatuvi.pdfIn PDF document text
    • http://files.hyperformancellc.com/uploads/1/3/2/6/132680967/vekakogutuz_xadasojogu.pdfIn PDF document text
    • http://files.cwudaytonoh.org/uploads/1/3/1/8/131872298/pubabomarudiso.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/1/0433/0687/7080/files/72645751706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/79887234476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/vurokewigepikibalejej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/62233844891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/noughts_and_crosses_graphic_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/jodozalomoxobozujopus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/xupifafiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/surujux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/75947076653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/varutilobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83300066175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/40707309032.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

Related samples 7

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_off000052f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F6 5572 bytes
SHA-256: a2ebfb2bba8a4b085c2207357bb49c14d488477f5482b952d41bed7593a00f74
font_01_sfnt_off000065d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 10568 bytes
SHA-256: 6b435c5b07fb34995931daef55c4cc0dedc25926e991d6d500ed42aa5ce4072f

Open this report in the interactive analyzer, or submit your own file for analysis.