Malicious PDF — malware analysis report

Static analysis result for SHA-256 b149aef5e5726d88…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 17:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd388d530c7ab197f54c261c5ff67123 SHA-1: 3376878a423d3105003ad80c2c687893a13e9e02 SHA-256: b149aef5e5726d88111b2952ad33d42c369dfb7f007c52f516f9966f279708c5
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though partially corrupted, contains text suggesting a 'follow up on request' lure, and a 'download button' heuristic further supports a deceptive workflow. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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=follow+up+on+request+email+template In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/93c935_cad32be3c05f4c5ab3baad23d33c7273.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/409ca8_9dee0467316a438d8ebef2bcd9b0a731.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0047a4_9bbf7fe8877842e5a7ed6e8dbcfc0ace.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_65f5a4aa69d9414ab67941a57846e3ee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/gefemunise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/beginners_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0608/9640/files/auditors_report_format_2019.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9890c627d50d460396f5bf46ce6f6998.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0ec3a8206cf54e858aaf867711047b19.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/696b8a_3caebffb9e584f97a23cfe1fc23126ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f515ca_aa26be86d9774636a330fd70c807285e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ea8bb_64cb7f5d5b1e4d0ca5dbcedb5ebe6914.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/efb3f0_020a86e2bba147289ced9f57f5c40273.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5ed537_beb7fab445bc45f6a4d5ecf24b0f1481.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6a5f2dd4af0e47188c580170f612d5ce.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
🗂 Part of campaign: shared payload 92eeed44f1 3 samples

Related samples 2

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_off0000751c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 5140 bytes
SHA-256: a0900d8f8f0771588e35ccd2004c9f2cdf61a10356b292134297a2226e4ee816
font_01_sfnt_off0000869a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 10636 bytes
SHA-256: 92eeed44f112fb77a8f5956f864e897d72e8b40e3fafa47d1917fc945788280c

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