Malicious PDF — malware analysis report

Static analysis result for SHA-256 502a44c8da2f8128…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 00:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4163ec7db3b0b22451c54ff5693f6cac SHA-1: a4f59ae791f7776afedf34ac86e759fc8d5b4eb9 SHA-256: 502a44c8da2f8128ce9e1e532ff7060b30ce78d81b1b1f144437ec5ee5041ed0
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm pattern, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The document body appears to be largely obfuscated or corrupted, but the presence of 'wkhtmltopdf' and a date suggests it was programmatically generated. The primary malicious activity observed is the redirection to a potentially harmful URL.

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=basin+and+range+mcphee+pdf In PDF document text
    • http://files.globalprayernyc.org/uploads/1/3/0/8/130813409/4767079.pdfIn PDF document text
    • http://files.bestprimeproperties.com/uploads/1/3/1/1/131164358/jefiwedegisiron_velexo_wufamiruz.pdfIn PDF document text
    • http://files.maladattaphd.com/uploads/1/3/1/3/131383247/7769813.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/1/0436/5628/2265/files/11534260798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/38806307995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/xipolojedegutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/vurujig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/zebiraroxinal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/93190961809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/32988505929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/92805585099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/winagirebofesegasug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/minafomabepuriwinawipixet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugifewelogukepebokiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/duzurewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/fafivobilolulaxapofofuwe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5184 bytes
SHA-256: f0dd00683707894e4a02256a59bfa6608b7fe39fad14e5510b90c233c3ade1f9
font_01_sfnt_off0000855d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855D 9992 bytes
SHA-256: 2110251955be3be48498a946fd677c538f94dc6fc414a1ff61e240ca29f53c44
font_02_sfnt_off0000a79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79E 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0