Malicious PDF — malware analysis report

Static analysis result for SHA-256 658ae2acfa5f6260…

MALICIOUS

PDF

50.6 KB Created: 2020-08-24 07:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba819d28ff26c283e6989c744a7c0cb3 SHA-1: 00af874fa6b80e1e71a3c3e724b481d206cb012b SHA-256: 658ae2acfa5f6260e0832a3d9e263aac42f0c633082a09ae45efc79084cf7434
194 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including a redirector URL, suggesting a phishing or scam attempt. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely as part of an SEO link farm tactic to disguise malicious content. The embedded URLs and the document body's reference to 'asientos contables pdf peru' and a Shopify link further support the lure of a downloadable PDF.

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=asientos+contables+pdf+peru In PDF document text
    • http://files.dnofsinger.com/uploads/1/3/0/9/130969184/nogexa.pdfIn PDF document text
    • http://files.hseforum.nyc/uploads/1/3/1/3/131383657/3430608.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/1/0429/8178/5753/files/26495158199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/bobadam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/11667695112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/93467974983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/36823365293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/xelubovafuxasek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/62535829964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/full_length_albums_free_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/velujijezugefitimixolu.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_off00007393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 5276 bytes
SHA-256: 451d0eaa8ff332b835fcfa7dc0290c5f08cb5537636ea8e8bfb500fd60e6ceb3
font_01_sfnt_off00008587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8587 10200 bytes
SHA-256: a526253e618e62b23292b2225ec1b16aa804ca1be4cb509a1a2e405d8e9bc8f5
font_02_sfnt_off0000a872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA872 16148 bytes
SHA-256: 64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b

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