Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7227a60483654a…

MALICIOUS

PDF

46.5 KB Created: 2020-07-26 12:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9647409c7f2547cec1609988c76a5699 SHA-1: 990234d377f9fb437bfd7b9d3416744df100c7bd SHA-256: 5c7227a60483654af037b5602412a5307ccff56970f4179b91ca556404101b5c
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this. The primary redirector URL is associated with known malicious infrastructure, and the linked SEO-optimized PDFs likely serve as a lure for users searching for specific software, such as 'bluestacks offline installer old version'.

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.cc/pify?keyword=bluestacks+offline+installer+old+version In PDF document text
    • http://files.trackfourjournal.com/uploads/1/3/2/7/132740515/e966fa.pdfIn PDF document text
    • http://files.williamsburgnaz.org/uploads/1/3/1/4/131410479/7335e5fc7bfdae2.pdfIn PDF document text
    • http://files.bviark.org/uploads/1/3/1/4/131437813/0fc3f512.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/1/0430/2739/8807/files/jisumexufukakigexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/mamibobozoladedadusimobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/todoramupokegililomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/buronikulomevijanowof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/96333330051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/65888083801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/16690898864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/12743830093.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 6

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_off00007811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 5072 bytes
SHA-256: f1b19818d12d963a1a841b229dd745dc4ae108509f6f82e8fb569bde490d053f
font_01_sfnt_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 10328 bytes
SHA-256: 136e1a915ec0a3219ca75a2a1198de5b8782b0d5a60a526b0db9329d852651c5

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