Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd573e0e7b4522…

MALICIOUS

PDF

54.6 KB Created: 2020-08-06 22:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a805bd898c125389233f31cc97435cba SHA-1: 5114a30b2a9090676c80fab044fa1919490c3430 SHA-256: a0dd573e0e7b4522da8dbce5c2ed16a0063c0546a9dcf7df5978e373e71f9311
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool for creating PDF documents, likely for malicious distribution. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=estat%25C3%25ADstica+aplicada+an%25C3%25A1lise+explorat%25C3%25B3ria+de+dados+pdf In PDF document text
    • http://files.ecinspired.com/uploads/1/3/2/6/132681660/61552d591.pdfIn PDF document text
    • http://lewodena.fifelake.org/uploads/1/3/1/6/131606027/733771aa8e0f613.pdfIn PDF document text
    • http://files.gravelroadhome.com/uploads/1/3/1/0/131070246/worep.pdfIn PDF document text
    • http://files.lauralorenz.com/uploads/1/3/1/3/131397987/wukug.pdfIn PDF document text
    • http://kodeli.stdympnas.com/uploads/1/3/1/6/131637257/majarunirar.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/1/0430/7327/4018/files/1160348999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4543/5030/files/python_sqrt_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/94791341162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/rifuwiruvowubafagixegox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6143/files/dokuxovidezasusemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/73814380411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/38605181676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/76305667030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/37795951266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dewomatarolokakutafago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/vastu_shastra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/mikudubonorobujona.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_off0000870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870B 5600 bytes
SHA-256: 2a3b291841208e672035323979b53fe8118a01c6bd2d07e0af01a6ec01cb9353
font_01_sfnt_off0000994f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994F 16768 bytes
SHA-256: f36c87f75c90a5e5a5e716380d10a13da88695003284a0a1388e0325ceb8bb3e

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