Malicious PDF — malware analysis report

Static analysis result for SHA-256 f543091aef2aa875…

MALICIOUS

PDF

46.8 KB Created: 2020-08-14 20:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b6312fd2f4f4b6303e42339014cee1a SHA-1: 2a6189a6bfdfa87500788e3eebf082e5d9994138 SHA-256: f543091aef2aa875e199723dee406b3a9db0dc07be1a20615e8b5fd1d1412339
202 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'printable promissory note form free' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content. The primary malicious URL is ttraff.cc, which redirects to a page related to promissory notes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=printable+promissory+note+form+free In PDF document text
    • http://gilanor.givoie.com/uploads/1/3/1/1/131164250/8644611.pdfIn PDF document text
    • http://files.villanovancaastudentchallenge.com/uploads/1/3/1/8/131871659/2801796.pdfIn PDF document text
    • http://files.uwflagler.org/uploads/1/3/1/0/131070604/libavixokazosi.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/1/0436/2692/2146/files/6th_grade_math_vocabulary_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/kapezivuvusotuxikazotix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/26425161310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/37785793600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/30808965988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/pesemasovowevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/bevimumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/73231463457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/78566702500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/fonorixova.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 4

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_off000078a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 5288 bytes
SHA-256: 6e3ffa59666f7663eec33650a965f1989299c4c629114567b20ea229a1be3e83
font_01_sfnt_off00008a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 10548 bytes
SHA-256: 7d9103d864410238d90749770c6064eb3d13ae19022959f6148188d904596e91

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