Malicious PDF — malware analysis report

Static analysis result for SHA-256 72aa75db86f5d05f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 10:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0a3d3e8ca2e185d6c07b8347a0cff2e SHA-1: e61e32859e988e628f821936924b8b2253619461 SHA-256: 72aa75db86f5d05fa34f78148070f9e903135566e378aeb010533dbb6e78af93
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The document body and heuristics indicate a lure for a 'free antivirus' download, which redirects to the malicious URL https://ttraff.cc/pify?keyword=bach+khoa+antivirus+mien+phi. This pattern is consistent with social engineering to drive traffic to malicious infrastructure.

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=bach+khoa+antivirus+mien+phi In PDF document text
    • http://files.galleryodin.com/uploads/1/3/1/0/131070918/5627222.pdfIn PDF document text
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdfIn PDF document text
    • http://files.vanengelsdorpbeelab.com/uploads/1/3/1/3/131381640/dfbbdb88361dd1.pdfIn PDF document text
    • http://files.soulsanctuarydance.com/uploads/1/3/2/8/132815123/sexiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/elementary_surveying_an_introduction_to_geomatics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/5837356281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/5346919281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/number_line_to_1000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/sawadalifelibesuwavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/pancreatic_pathology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/wanoxoduxaraketepewekavaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3227/9200/files/xizimadotegasowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/certificate_of_completion_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/french_vocabulary_lists_by_topic.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 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_off000056cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56CC 5196 bytes
SHA-256: 330f46eb2b0671e0dd0196b58b3d2b19dd2b193c716f67d8e08933819db2ff6b
font_01_sfnt_off00006846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 9844 bytes
SHA-256: 57f4e78c76e491a456d5da33178c188dfe4d85aab535ed4a4437078207eb64d1
font_02_sfnt_off00008a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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