Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92e991a88bb8872…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 09:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d8812a6419b0086b003d5e0837b37f6 SHA-1: d1eba98558c98d70fd833362bd36a5291eb7fc63 SHA-256: d92e991a88bb887296e7ca3eb7bc53960724b10e90f6fad91842cbebf1ca0c8d
202 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, contains text related to 'Ktu academic calendar 2020 19 pdf', suggesting a lure to disguise the malicious links. The presence of a visual download button heuristic further supports a social engineering attack.

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=ktu+academic+calendar+2020+19+pdf In PDF document text
    • http://files.ancsr2020.com/uploads/1/3/1/3/131398008/pesaluwewixi_nigofo.pdfIn PDF document text
    • http://files.lafayetterealestatehomes.com/uploads/1/3/1/3/131380177/587e264d.pdfIn PDF document text
    • http://files.citizenphysicians.org/uploads/1/3/0/7/130739073/7743874.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/1/0450/2913/0404/files/calendario_annuale_2020_da_stampare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/silent_letter_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/13396668954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/2380248037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/jaxozedazejatixinilodel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/turunexovoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/89942231631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/65527842737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/61350201736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/39296291445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/extended_weather_forecast_pasadena_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/18941805203.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_off0000601c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601C 5576 bytes
SHA-256: 4dbb2360404e95ac47a8c522e3f72dde88c9e1f848d623d59a64490e357944bf
font_01_sfnt_off000072fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 15012 bytes
SHA-256: cf677629b7225a04547d1a272220b27d52b31f4aadc1874b607a749ddac7d89a

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