Malicious PDF — malware analysis report

Static analysis result for SHA-256 230e19134813327f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 16:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9873a347da9accc1e9f1f417b0526ff2 SHA-1: a5ef8831a503e7e1b54f1225966c1b2eaae59f41 SHA-256: 230e19134813327f7830f847a209aa29676d32a5e88e71ad5fa085589d17e2a9
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious payloads or phishing pages. The document body text explicitly mentions "Auto call recorder apk free" and includes the malicious URL, suggesting a lure for users seeking this software. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link points to known malicious infrastructure.

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.com/pify?keyword=auto+call+recorder+apk+free In PDF document text
    • http://labuku.preschoolinthevillage.org/uploads/1/3/2/6/132681394/a88e9379189bc6.pdfIn PDF document text
    • http://files.tpccommunicationsaustin.com/uploads/1/3/1/4/131453054/8e408bb02.pdfIn PDF document text
    • http://files.skippysfrenchtoast.com/uploads/1/3/2/6/132695352/sapofikapizuj-gewaw.pdfIn PDF document text
    • http://files.soundboundhealing.com/uploads/1/3/2/8/132814166/fesubaguwabe.pdfIn PDF document text
    • http://files.opobusiness.com/uploads/1/3/1/3/131384401/3294b62945a62.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/1/0434/2821/6983/files/57111673927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/taduden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/w_b_c_full_form_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/kasitosagowizitisatifanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/55149937690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/57543962237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/94974207324.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000539e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x539E 5024 bytes
SHA-256: d718c027363d7c78201c907a95513f48cb03cd859d3a18e1f34916925e3eb03f
font_01_sfnt_off000064c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C7 10436 bytes
SHA-256: 4bbf5b5c95f150fb98725bf6cf25b0d430bd3ac505fb42f6e7d5cd8b16edf869
font_02_sfnt_off000088be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BE 16204 bytes
SHA-256: eff505afb8e26c38bee6bcfe2a1fe7ec06ef672c1b18ea48f40a557974472291

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