Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7753f9f1fc94fb…

MALICIOUS

PDF

46.4 KB Created: 2020-07-29 06:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8de2606e4e82833483e5afea550599be SHA-1: 00e046798c3f360258f0b98cb127f0cb94238dda SHA-256: af7753f9f1fc94fbcf213f58e18d0e59cd5435a9435e08692c1e52f942041e17
194 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 of which point to Shopify domains, forming a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Arizona business management study guide'. The combination of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious infrastructure.

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=arizona+business+management+study+guide In PDF document text
    • http://files.stellamakes.com/uploads/1/3/2/8/132815791/6ba79ff1d.pdfIn PDF document text
    • http://files.laurabain.com.au/uploads/1/3/2/8/132815342/jevotiwa.pdfIn PDF document text
    • http://files.7thgradescienceworld.com/uploads/1/3/0/8/130813144/kagawan.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/1/0429/0586/2307/files/nuxusomezunivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6787/4207/files/lepitukulalokezedufupij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/53430780671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8158/7095/files/19956317449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/dovubiliredexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7552/5022/files/17746100939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/41329829451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/gijivopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0642/7299/files/33004032258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/filibodojegavubi.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 5

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_off0000761d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 5276 bytes
SHA-256: 1d0a5c37e8a27be2b4b7169ee7338ef0d1ba3e94e425271f4f573187eaadbf1e
font_01_sfnt_off000087fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FA 10688 bytes
SHA-256: e7acf02540d340f64353cd9c55fa267b11c86a4dff815567fd18ab250a1f3f90

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