Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8e4bd23d62feb7…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 23:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5faafd9ab03b79788b3e0aee75eeb95 SHA-1: 2573dd11c457ad1da19a1e5468eac7ad3769f455 SHA-256: 9b8e4bd23d62feb71749c922abbdef0e15c18cf82d9c5754ca158d90e1cd7d10
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL, https://ttraff.com/pify?keyword=bachelor+thesis+example+pdf, is designed to lure victims by appearing to offer a relevant document. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the PDF structure and embedded links are sufficient to determine the attack vector.

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=bachelor+thesis+example+pdf In PDF document text
    • http://files.acadiabugproject.com/uploads/1/3/2/7/132740965/d188d211.pdfIn PDF document text
    • http://files.brendathour.com/uploads/1/3/1/4/131438018/nujabelikokutuk.pdfIn PDF document text
    • http://files.melodicfusion.org/uploads/1/3/1/4/131452959/dalizonelomas.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/1/0434/2222/0439/files/nba_media_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/something_awful_emoticons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/totirusejopodinidiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/begekixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/vawofiwepupaxasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/6862007592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/design_of_classroom_action_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/33973290570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/action_research_in_science_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/wubijobudugomofef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/wow_mage_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/jiluvefil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/96401894672.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_off000064ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AB 5512 bytes
SHA-256: 3035560c88886a2a3960264b79cb6e8bb32eceef014d2791596766573030c3ad
font_01_sfnt_off00007746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 10572 bytes
SHA-256: 054f83d53c5898eca5de032676aca763ab025ce3137605c8bf1fe35e8ae43125

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