Malicious PDF — malware analysis report

Static analysis result for SHA-256 450de266719b0bcd…

MALICIOUS

PDF

41.3 KB Created: 2020-08-17 03:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21ddeb7f67430708680aeed2b1beafb0 SHA-1: 1bfd51489dba9a347f63b731ee161164219cf6ae SHA-256: 450de266719b0bcddeb627bcc04839e72225089c2c2763ed9e82880564e9dc7a
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to cdn.shopify.com, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the string "Bilibili video 2018" and the malicious URL, suggesting a lure. The presence of numerous external PDF links and a malicious redirector indicates a phishing or social engineering attack aimed at directing users to harmful content. The heuristic firings confirm the presence of malicious redirector links and a link farm, supporting this assessment.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=bilibili+video++2018 In PDF document text
    • http://files.coast1031.com/uploads/1/3/1/4/131484328/1831852.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/1/0438/6249/1286/files/anestesia_dental_en_el_embarazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/45700101042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/citizen_ana_digi_temp_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/ziduwebukelitab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/jimaniliniferu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/xelipuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/22549367237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/64079399913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/33625994532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/fagatibojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/gutirudosene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/35094993805.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 2

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_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 5104 bytes
SHA-256: 5960241f02d012a0675f123d2f66b279d724909d500d2894f96e3df19b74c9bd
font_01_sfnt_off000075db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 10228 bytes
SHA-256: 0fea82da45d18da92c0150e3e3cf74baec7fc659f271590fd727c69b9efbb58a

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