Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad73e1f08a58d8c8…

MALICIOUS

PDF

38.9 KB Created: 2020-08-19 08:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90ca0e3013e7e45c9e3957b1f12b82fa SHA-1: 559328dcd69ebba89a12eb2b2c5e3ea6a855aa19 SHA-256: ad73e1f08a58d8c8a667b1df1321a947d2d22a8b23f0fdca6df7386c0b145c25
202 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for educational content, likely to trick users into clicking the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=spanish+english+cognates+worksheet+answers In PDF document text
    • http://tubosixe.darbodus.com.au/uploads/1/3/0/8/130874063/1814bdbd63660.pdfIn PDF document text
    • http://bavumom.troop133.us/uploads/1/3/1/4/131406263/17153ddf59d24f.pdfIn PDF document text
    • http://nijew.maternitybabyacademy.com/uploads/1/3/2/6/132682883/6ca87dc5bae68.pdfIn PDF document text
    • http://files.claresouthworthflute.com/uploads/1/3/1/0/131069887/2410649.pdfIn PDF document text
    • http://files.kathleenmarchetti.com/uploads/1/3/2/8/132814250/xakipojo.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/1/0438/3706/3328/files/refowivamawimexomuvusir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/pazetepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/gestion_del_capital_humano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/disorder_of_carbohydrate_metabolism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/17608072048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/wozibonujokavitovalumipur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/56968141557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/vifaxuzogavibemebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/gidufazususuxobuwi.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 7

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_off00005811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5811 5456 bytes
SHA-256: 3e67743396a57e006820a4e515809dd6e9eb8b46755db031dadc05d143b2fa59
font_01_sfnt_off00006a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9F 10668 bytes
SHA-256: 01a18e68efd7088f5d1e7e5f41f7bbfedf3d0d350ea1f99a9299529f63ec34d4

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