Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b640f59c9d2e19…

MALICIOUS

PDF

56.1 KB Created: 2020-08-09 19:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83be164b6275e58d59a7dfd61258f5c8 SHA-1: 356550a93bec3825ae37d6415f32e76641460f80 SHA-256: 38b640f59c9d2e19e3831825273fc73c31dbf4765b39b019b17b69de557f7294
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=mercado+internacional+definicion+pdf', suggesting a lure to a malicious site. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=mercado+internacional+definicion+pdf In PDF document text
    • http://files.joshuaproject.community/uploads/1/3/0/7/130776775/9885152.pdfIn PDF document text
    • http://files.stjhollandfaith.org/uploads/1/3/0/7/130740033/3637342.pdfIn PDF document text
    • http://files.stevenpitman.com/uploads/1/3/1/6/131606349/138c2515.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/1/0434/0639/3496/files/zagobufeveganuxeralaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/jegitetawaxelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/welerixiwofuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/57939943613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/temavoretixaruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/41354030548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/dujudukobumiralere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/quarterly_report_template.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 1

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_off00009cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAE 4976 bytes
SHA-256: eedfd401ec09fb81858adf09b1c1ebcca177ca62a51b2d1613ab7ea75a1dc15c
font_01_sfnt_off0000adb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB7 11164 bytes
SHA-256: 38f716ff5c8387ca8f7c846975f50a7bcf30e031fa561d2f411077403266e1d9

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