Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c81b5c3eb07a97c…

MALICIOUS

PDF

49.2 KB Created: 2020-08-14 15:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab63f56f5062e213159a89f47a43c30a SHA-1: 76d5f9b6e91ffe94ca6df6a9d0fb6df6b4a26259 SHA-256: 6c81b5c3eb07a97c9f1096175edc232b3ddfb19a3bc3fda43085ca935abd7af6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the text 'Eg j swap guide' and the malicious URL, suggesting a lure for users to click through to a potentially harmful site. The ML classifier also strongly indicated 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.com/pify?keyword=eg+j+swap+guide In PDF document text
    • http://files.margek.com/uploads/1/3/0/9/130969981/rujawepomiruv.pdfIn PDF document text
    • http://files.authorkarenredmond.com/uploads/1/3/1/3/131378852/13125aea.pdfIn PDF document text
    • http://files.mastersofmasternodes.com/uploads/1/3/1/6/131606284/rofixoxemuw.pdfIn PDF document text
    • http://files.frommairpad.com/uploads/1/3/0/9/130969966/wurewe_banonirevibu_jojajivi.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/gujogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/tiboko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/flip_table_ascii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/42037127086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/wevubinirawofus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/naxubowitemejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/autodwg_dwg_to_converter_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/89938631834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/counting_stars_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/banking_awareness_by_arihant_publication.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_off00007775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 5124 bytes
SHA-256: c6830f4c3e6018755d8bbf3018cbfcd4630b052dfc170847642827b8aaa19cf1
font_01_sfnt_off00008915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8915 15044 bytes
SHA-256: 3650143b9c086c533d0cbaf2acaf74ac5684a76bf660bcb320ac23d7ef133915

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