Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1eb6921037d3d91…

MALICIOUS

PDF

34.1 KB Created: 2020-09-09 14:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfca23bb427fbef6b776b7177cc964c4 SHA-1: 66741fb8602acd69133ac0c272b1dd4efa2b7d84 SHA-256: a1eb6921037d3d913de978b821132a7701ac3a81c9d5c94a794f3dde06fd94fe
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document body itself, though heavily obfuscated, contains the same malicious URL. The presence of a large number of external PDF links, many pointing to unknown domains, further supports a malicious intent, likely to redirect users to malicious content or phishing pages.

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.link/pify?keyword=free+ahoy+its+a+boy+invitation+template In PDF document text
    • http://naferipe.drhannahcurtis.com/uploads/1/3/1/1/131163635/zolow_soxex.pdfIn PDF document text
    • http://xewitil.monamoody.com/uploads/1/3/2/3/132303195/89918.pdfIn PDF document text
    • http://resiferim.allsaintshighwycombe.org/uploads/1/3/0/7/130776819/lupane_wepomegijumev_nolab_kukawez.pdfIn PDF document text
    • http://files.greengeckopublishing.com/uploads/1/3/1/3/131379732/f35c105de387b.pdfIn PDF document text
    • http://files.greyart.net/uploads/1/3/0/9/130969191/zekatamedepameb.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/1/0430/3699/9842/files/rhel_lvm_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3110/9272/files/xozepulumibovejinepeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/60405758143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/juzenesigod.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b6424_031767c20d914973b6cb9870badf3022.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/30e015_751720f4990740d2af19163916413fd4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3794ad_0ee0513d3b5c493a8ab47321e28d56d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01f9b9_1a0330e6ebba4223836710288a5cb288.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7c3584_ee32236b8e2c42b6a6b95c7a957c98f9.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_off000048bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48BF 5316 bytes
SHA-256: ae85d61a3e600dceaac364b43ff0bb8318bf59a178e793fbdf775ce889e0c19c
font_01_sfnt_off00005ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 9652 bytes
SHA-256: ef53743f16eea96b31d64e0fa80d9b62ef81fed326963625db54bab846776641

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