Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef36b6166ec2306b…

MALICIOUS

PDF

81.4 KB Created: 2020-08-03 05:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffe2ad18d6a512fbc55f0c7a6d67375d SHA-1: 193c8310c9712b16038cfcdaa7358c5c3f83bb3c SHA-256: ef36b6166ec2306b5b1db440bb228c73b0574aabbfe7f5c01ac0439bd72f3a7e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. One of the primary links points to a known malicious redirector service (ttraff.cc), suggesting a phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=void+on+trigger+enter+example In PDF document text
    • http://files.lemonpatches.com/uploads/1/3/2/6/132680986/4918194.pdfIn PDF document text
    • http://files.earthartbalance.com/uploads/1/3/1/1/131163667/bojimunedage_nifobakumitig_jeledojupika.pdfIn PDF document text
    • http://wugoba.drickahair.com/uploads/1/3/2/7/132710621/nidufogexujo_pugop.pdfIn PDF document text
    • http://files.peacememorialauditorium.org/uploads/1/3/1/4/131438142/bigovaj-kijebujukeleba-kojuvutunu.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/1/0433/9623/5415/files/undeath_immersive_lichdom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/wokuriwomuxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/14801257676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/divanowililemaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/dumejijijuxapab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/97136184024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/26908210752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/49699724598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2529/0648/files/vopotiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/carrier_reefer_unit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/10264164103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/sosebet.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
🗂 Part of campaign: thekingdomiswithin.com 6 samples

Related samples 8

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_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 5136 bytes
SHA-256: 2d893c3eeb1713c69b3d4fc0c08196d77a310cd6485b11c4217e5083e562c6ad
font_01_sfnt_off00010c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 13652 bytes
SHA-256: cc7b1432ad132fc5c08489a5241ad3a60470648e5568f8bb06d16d550fcbb20d

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