Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8a924fea48eacb…

MALICIOUS

PDF

41.7 KB Created: 2020-08-10 05:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a4be30d491566a259546064795a9806 SHA-1: 35d9ef389758dad557291142194f69148d231195 SHA-256: 0d8a924fea48eacb81f03c0e9b692c0d2fd08755e5ffe9b06ea9ed6a5759cbb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to a redirector service, which is a common tactic for phishing and malware distribution. The document body and embedded links suggest a lure for free PDF downloads, leading to potentially malicious content. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to an attempt to obscure the final malicious destination.

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=basic+information+about+computer+pdf+free+download In PDF document text
    • http://files.ncpastoralcounseling.org/uploads/1/3/1/1/131163957/veduran-wenemip-siwokikiba.pdfIn PDF document text
    • http://vafilu.tobiascwong.com/uploads/1/3/2/8/132814930/sogowunuko-pedarelokuwi.pdfIn PDF document text
    • http://kodebute.carteraccountingandtax.com/uploads/1/3/1/0/131070420/5afa4cb82c1.pdfIn PDF document text
    • http://files.fastlanenitrous.com/uploads/1/3/1/1/131164479/9187223.pdfIn PDF document text
    • http://diwolago.raemiz.com/uploads/1/3/1/6/131636655/romutid-rikamafat-nipuwu-xeridiluzuxikix.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/1/0428/8043/4342/files/bulupakojevifepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/38449996071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/27095685027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/zepob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/20524598903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/truman_capote_in_cold_blood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/simunotasawonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/19050870259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/93537643690.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 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_off000064bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 5580 bytes
SHA-256: d07b4f28938bd2ebab7ef97b63e6819b8e770abda1f423153b46cd6fe2174eb7
font_01_sfnt_off000077a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 9992 bytes
SHA-256: 87b63f3eaa7606116ab47d49e72709f047f53107ec20eed87fbaac3c1561dac8

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