Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a58d9f9f15c291…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 03:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4245f8bf114bae7d665b991439bc0b5d SHA-1: 28244e44e3511b675882f70bbe7a4f4249cdad28 SHA-256: 54a58d9f9f15c291ea62629ab4c791430bb3b65a7522e148f2e46876bb80f693
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting a technical reference, which is likely a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a coordinated effort to drive traffic to malicious sites. The primary attack pattern involves using a seemingly legitimate document to trick users into visiting a malicious URL.

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=algorithms+in+a+nutshell+a+desktop+quick+reference+pdf In PDF document text
    • http://files.naturalbirthingjoy.com/uploads/1/3/2/7/132741155/difigeluti_foxemudabi_fokomerom.pdfIn PDF document text
    • http://files.caseworkproductions.com/uploads/1/3/0/8/130813985/pofosez-dodep.pdfIn PDF document text
    • http://files.asyouwishuk.com/uploads/1/3/1/4/131454024/98bd4902cc6b.pdfIn PDF document text
    • http://files.mycyberphile.com/uploads/1/3/1/3/131380467/lisetazufipesekizif.pdfIn PDF document text
    • http://files.michaeljohnmccarthy.com/uploads/1/3/1/4/131453215/1307036.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/1/0438/4541/9173/files/zuwujaxanugeruwosexiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/76402031628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3776/0408/files/21455173599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/60110179245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/retonavewarazasitekem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/92027584013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/essentials_of_statistics_triola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/wabiwigevoludogexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/ssc._nic._in_mts_result_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/xodanipoxaxun.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 8

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_off0000632d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 5748 bytes
SHA-256: 8791bc880e3f5973df5de14788ce4b05a2f218efb2fef08baf856f51b4bf5aa0
font_01_sfnt_off0000768f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768F 10012 bytes
SHA-256: b29c71754e811274d6277471ff7c7e60775e08d75c41fe6ae5a129efc04002a6

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