Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e4848c50904b97…

MALICIOUS

PDF

49.7 KB Created: 2020-07-29 22:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f40ac8f4405f4dadc14e759875bb905 SHA-1: 34cc29496bc42cf305b0b3cdd22802cee4a97231 SHA-256: 87e4848c50904b977aa14fd7cfe50ff70572dd99733db70a4e4a2e0554e3ab96
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a source for free books, but the primary link redirects to a malicious URL. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The embedded URLs and the heuristic firings strongly indicate a malicious redirector used for further compromise.

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=automotive+technology+books+free+pdf In PDF document text
    • http://files.cflseahawkers.com/uploads/1/3/0/7/130738841/7699720.pdfIn PDF document text
    • http://files.sierrastonefabrication.com/uploads/1/3/1/4/131482864/nazunegetu.pdfIn PDF document text
    • http://files.aedprockymountains.org/uploads/1/3/0/9/130969993/be91b563a65e.pdfIn PDF document text
    • http://files.alloneocean.org/uploads/1/3/0/7/130775291/wumutiz.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/1/0429/6615/5430/files/ludono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/zaganoxutakaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/sakosubode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7043/1125/files/sivipiteki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/40352375068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/98258146600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/tupebojamagiwopazolerudot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1569/1678/files/zeteju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30552771564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/mabemobonupofenijuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/guzurogim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/delukitifomogirifado.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 6

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_off000083dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DD 5596 bytes
SHA-256: 547e1dd37aa37ac5f37f64ea9d607e91df09f8b03c33afc7afd8b05afe98b05b
font_01_sfnt_off000096ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CE 10112 bytes
SHA-256: 14dca007e90d83b70558bd79ba40b1d9f3177871a75a412b50a08ffca4be5d3d

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