Malicious PDF — malware analysis report

Static analysis result for SHA-256 57813d12c4e639b3…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 18:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a2399e7e5d19dc7e7ef3a03a4117d12 SHA-1: bf70f2a859c898edf80e351d37ad2bd7713cd736 SHA-256: 57813d12c4e639b318d0d1c47e7e719ce75ba06ef44364eba643c925eef4a8a9
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.com. This domain is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the text 'Present progressive questions and answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to obscure the final destination.

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=present+progressive+questions+and+answers In PDF document text
    • http://files.ajitourservices.com/uploads/1/3/1/8/131856380/6510508.pdfIn PDF document text
    • http://files.mackbrosgroundskeeping.org/uploads/1/3/2/6/132682790/b5dad515f4b2ab3.pdfIn PDF document text
    • http://files.yojimbocorp.com/uploads/1/3/0/8/130874493/8a7691c9.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/1/0434/1982/8386/files/vavujijugupelavofibun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/mijasuvofode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/57408642204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/misebanijumarumota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/maryland_tax_form_502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/ginuxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/45905295359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1173/5705/files/malosifetuwunakate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/zaxude.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_off00005adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADB 5372 bytes
SHA-256: 5d3858cb8cc317c566547017baddb1441941fd005ce77f43864c8ed59ac473db
font_01_sfnt_off00006d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 10288 bytes
SHA-256: 7378abf406692c15ef7daa472deb6b528de8a58abd4342e0b3f9f7ff0cbb5cb4

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