Malicious PDF — malware analysis report

Static analysis result for SHA-256 143f83341ce0ee5b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73e6eb3d13421aac27cf2732ebf2d9c5 SHA-1: 12f557b2578eebcbdb5b31203dbd95fd60c27611 SHA-256: 143f83341ce0ee5bb4c52d726840cb891ceb797fdb3ef89d3225c028daf2f9c1
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is part of a link farm designed to distribute malicious content. The document body, though obfuscated, contains the primary redirector URL and several other PDF links, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicates maliciousness.

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/pify?keyword=ioccg+report+6 In PDF document text
    • http://files.protelica.com/uploads/1/3/2/6/132695575/tujelediledasif-kejalatotadas-xananabogovar.pdfIn PDF document text
    • http://files.ironkoi.com/uploads/1/3/0/8/130873795/c6b3e610.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/1/0428/9835/8432/files/13170590630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/kemevigajowotofet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/60807374902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/51805209926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/bundesagentur_fr_arbeit_kurzprofil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/kmp_algorithm_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/kigir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/ffxi_smn_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/58088701729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/31915502466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/74136355269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4414/9150/files/27436315849.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 3

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_off00005d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D48 4772 bytes
SHA-256: 2a935443a51bdc8e32af82598dbfd58c349cecca1bb8aa58a34f68eac8d83457
font_01_sfnt_off00006d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 10436 bytes
SHA-256: 683b7095bf8fdf0543a4a4877efd93948e52c14ba83f22d3e4c11ce74f917730

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