Malicious PDF — malware analysis report

Static analysis result for SHA-256 028881f530b21d93…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 20:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c98c984347a72e3f51a0eec67d80ab5f SHA-1: 36e8ceeaaa7e432d54141d3e17483d92327da70d SHA-256: 028881f530b21d93dba1524b3d820d420d97112b6df949b0cbdf2afe9b2954eb
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at `https://ttraff.cc/wb?keyword=tuberculosis%20causes%20pdf`. This suggests the document is designed to lead users to malicious content, likely for phishing or scam purposes. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted from this sample.

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.cc/wb?keyword=tuberculosis%20causes%20pdf In PDF document text
    • http://files.graemesteelejohnson.com/uploads/1/3/1/4/131407552/bf387cda384ee.pdfIn PDF document text
    • http://files.themohicans.net/uploads/1/3/1/8/131871849/3c30e035.pdfIn PDF document text
    • http://files.greenbaywalleyeseries.com/uploads/1/3/1/3/131379820/7ceca068b69f.pdfIn PDF document text
    • http://files.joseluismartinezmoreno.com/uploads/1/3/1/1/131164568/lifukusufep.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/1/0431/9281/1681/files/pidupaxozepiziwejux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/radasekinimoritomon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/42308954220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/41955145257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/64617517955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/goramidikogikonajadaneko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/the_ugly_duckling_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/midegutedog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/cressi_leonardo_manual.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_off000071e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 5236 bytes
SHA-256: f94739ad97b0bb605cd58c663f97556aaadb43baad368c84d7d9362db8238fdb
font_01_sfnt_off000083bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 10516 bytes
SHA-256: 54179c5f7a7dc4978100af952da29f840e9957743086f3953343e017aee9f3f0

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