Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c1c070d67456aa…

MALICIOUS

PDF

46.2 KB Created: 2020-07-30 18:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 601eabaa6ca94ad3d19a29a44aa3ab89 SHA-1: eff7f2e16bedf6bb9df38352800bbba1fae88802 SHA-256: 84c1c070d67456aa3730a17bf83f12d3bf4444e5af155985b535cbec06668427
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to a redirector infrastructure known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'app store optimization', likely a pretext for phishing or malware delivery. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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=advanced+app+store+optimization+pdf In PDF document text
    • http://files.solutionspsych.com/uploads/1/3/1/0/131070151/59d67977906bfee.pdfIn PDF document text
    • http://files.alwaysalphachi.org/uploads/1/3/1/1/131163533/bexoro.pdfIn PDF document text
    • http://files.jessisartandpipersphotography.com/uploads/1/3/1/0/131070845/1022854.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/1/0433/9000/9502/files/woxaxojig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/60096745114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/vufuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/nosadenibif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/pusibometog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/depajepukaxixewedadupumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6722/7811/files/95469946215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/49443808175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/bufigofexoketoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/55675114719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/ferakikufitisozaras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/86910443526.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_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 5156 bytes
SHA-256: 5625cb4445b4a19c698fda95f2b27862484084b6f2ce03bddddea8c3a984c771
font_01_sfnt_off000089ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EA 9968 bytes
SHA-256: 45e2cadf78be915177ea6a0b60559662d02602a42e036622f48b911f687b8024

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