Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa61cdcbb9f457b…

MALICIOUS

PDF

51.6 KB Created: 2020-08-04 09:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6601f23df9ad33f8e538db53109f2c97 SHA-1: 3325dbceb02f20b3ce419cf4e0296df5e48f6e60 SHA-256: dfa61cdcbb9f457bf53225b6fdf7cf4dfd1876f73361cc16b804ca03d03412c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as search results for academic material, but redirects to a malicious URL. The primary malicious URL is ttraff.cc, which is flagged as a malicious redirector. The document body is heavily obfuscated but contains the malicious URL and appears to be generated by wkhtmltopdf.

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=name+reactions+in+organic+chemistry+pdf In PDF document text
    • http://files.matakanacommunitygroup.online/uploads/1/3/2/8/132814241/10e828.pdfIn PDF document text
    • http://files.yodopay.com/uploads/1/3/2/3/132303248/1602960.pdfIn PDF document text
    • http://files.sharongollan.co.uk/uploads/1/3/0/8/130874124/4da2656.pdfIn PDF document text
    • http://files.christchurchbabylon.org/uploads/1/3/1/6/131636903/pabiruk_tojexif.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/1/0433/6081/3208/files/89970536773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/mepoxegimorij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/14144696305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4566/5433/files/20001869202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/at_t_premier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/52668486261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/vmware_workstation_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/wazalefiwebaragomowijeniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/redfield_revolution_2-_7x33.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/47252415510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/duvoluwax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.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_off0000764d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764D 5396 bytes
SHA-256: 32357d507ea66dcbb72c716423ce7398add71e752a41b2830ef2ab1e677bd99f
font_01_sfnt_off0000887c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 13420 bytes
SHA-256: 656135409904ae05fd8eb794b69ff93b636b68011fa06982abe8f821b42c0401
font_02_sfnt_off0000b29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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