Malicious PDF — malware analysis report

Static analysis result for SHA-256 d536dc3af5059bd1…

MALICIOUS

PDF

43.0 KB Created: 2020-08-04 16:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6816dbb7fbcc7812d8123ab4934ff71f SHA-1: 1c05f27feea126120b5e3885f561d051ff987da7 SHA-256: d536dc3af5059bd145a43a635843fd86979d1f6707f54deef78b6e18d3483d11
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'accounting ratios' and a URL that appears to be a lure for downloading a file. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. The primary malicious URL is https://ttraff.ru/pify?keyword=accounting+ratios+pdf+grade+12, which likely serves as the initial stage of a phishing or malware delivery chain.

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.ru/pify?keyword=accounting+ratios+pdf+grade+12 In PDF document text
    • http://files.alsdesign2learn.com/uploads/1/3/1/4/131407227/9fe03811c.pdfIn PDF document text
    • http://files.wendyscoiffure.com/uploads/1/3/0/8/130874620/sinimepoxabukipa.pdfIn PDF document text
    • http://files.greentarafarm.com/uploads/1/3/0/8/130814774/2633758.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/1/0430/2385/9873/files/41636320870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/86043880178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/99780211210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/42289317975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/ssh_into_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/93341015623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/pgyer_movie_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/rukexup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/tepagebafonajerasosut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/ziwilobowukurevawovibure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/dufirisuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/98246934756.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_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 5464 bytes
SHA-256: 4359532d3944bfea86a5ecbdc82b726509b86bb82043d1487ede31cf0d96306b
font_01_sfnt_off00007d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 9928 bytes
SHA-256: 8d0f3820d0bdfa2e07efad8358dd822a1be5d580d361d78ff1871c0a89687b61

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