Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a8708b7f80f028…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 10:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff8ef336d4cc306b0cd6eb0e7f77af53 SHA-1: 2a1d0a803532c13c77e90c9db043ec2bd3b7a280 SHA-256: 08a8708b7f80f0286f1e6ea05964c9b8d04895849cf9d901bf517a23fe7378fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirectors like 'ttraff.com', which is flagged as malicious. The document body and heuristics indicate a link farm designed to lure users with keywords like 'convert epub to pdf file', suggesting a phishing or malware distribution scheme. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=convert%20epub%20to%20pdf%20file In PDF document text
    • http://files.nicoleuphotos.com/uploads/1/3/0/7/130776725/rikuravijumuvi-wutepato.pdfIn PDF document text
    • http://zixev.pawneecityboe.com/uploads/1/3/1/0/131070718/4624113.pdfIn PDF document text
    • http://files.apowersphotography.com/uploads/1/3/1/1/131164479/13b06.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/1/0429/9699/0105/files/historia_del_almacenamiento_en_la_nube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/59753413083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/84873408505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/xevazivukofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/banaxolitiwolefixaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/regex_non_greedy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3553/files/el_banquete_de_platon_ensayo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/tirare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/bibeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/bsc_physics_syllabus_gauhati_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/muwunobimilumunadosiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/strategic_planning_examples.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F1 4752 bytes
SHA-256: ed4aa8597cb37cee4690b3bfb1674aa26c6fa80c102ff26412023b4ce20988aa
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 9968 bytes
SHA-256: 3a902407ddce1959b6b8614ddf31c4ceb3bb4148c4c8a7a7e35d5de3ab69bda5
font_02_sfnt_off00008692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8692 16076 bytes
SHA-256: f283a563ee48c68d0f210b91d059b93f2da97875a4894e08c15e1f8ed5b97a7d

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