Malicious PDF — malware analysis report

Static analysis result for SHA-256 1755a0104d34c6f0…

MALICIOUS

PDF

35.3 KB Created: 2020-08-26 19:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3c45ba2d1dca54f2ec7c83fbd3124f2 SHA-1: 84c643c453be723a6d1005dfdf841475bece1897 SHA-256: 1755a0104d34c6f0fd05f969f0fb4649805c743498eca91f277ca409ee002be0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector, identified as a malicious infrastructure, which is presented as a 'free download' lure. This is further supported by heuristics indicating a link farm and a redirector specifically for phishing. Although no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing attempt to deliver malware.

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.cc/pify?keyword=phcyber+vpn+pro+free+download In PDF document text
    • http://files.cinnamongirlpurebotanicals.com/uploads/1/3/1/1/131164520/3411592.pdfIn PDF document text
    • http://files.tuscanrenaissanceacademy.com/uploads/1/3/2/6/132682640/fewerotunanisi.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/1/0429/5278/6074/files/kodonolakim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/6994924121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/brain_anatomy_and_physiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/calendario_escolar_2020_e_2020_sep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/22071165416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/what_is_the_purpose_of_the_millennium_development_goals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/77420377246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/alphanumeric_series_tricks.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 8

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_off00004c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2E 5460 bytes
SHA-256: 1c34eeafdc5a9cc42df984f9729b2671a84631ef43123055f08746e181e26bb2
font_01_sfnt_off00005ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC5 9940 bytes
SHA-256: 1e63cc77787f3a67efcdae31961cd2f0ab7c016c1ce0b76139a6766f63f3c805

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