Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50e1194262cd37d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-17 01:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1e805fd3a3dfe6bb576d3ebf5f5362a SHA-1: eafef9cd8c31a13f680659c9359857bfe313d3c8 SHA-256: a50e1194262cd37d0e056d727ba9ca3c44ab9cc02238d884284d6c31121216fb
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. Additionally, it contains a large number of external PDF links, suggesting a link farm. The document body contains obfuscated text and a URL that appears to be related to VBA macros, further supporting a malicious intent. The primary IOC is the redirector URL, which is likely the initial point of contact for malicious activity.

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.ru/pify?keyword=vba+activesheet.+pastespecial+xlpastevalues In PDF document text
    • http://files.musicals-101.com/uploads/1/3/1/4/131437864/xesov.pdfIn PDF document text
    • http://files.markheggaircraft.com/uploads/1/3/0/7/130739802/6950470.pdfIn PDF document text
    • http://files.whositsandwhatsitsgalore.com/uploads/1/3/0/9/130969265/6e0669456f.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/1/0431/4664/1570/files/vixepaxixomubikareximule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3164/5608/files/catholic_liturgical_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/poultry_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/66047411194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/72974152663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/90990725752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/65526912932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/nelaragivojiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/maxaxudevogavedusadoron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/nivusekiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/retiniworakidarupuzezubu.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: markheggaircraft.com 3 samples

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_off00005d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3B 5192 bytes
SHA-256: 6c632b7bb4acba032a827e8ee63a87ee54f4a79b9eb90101dc023df2579e3dc1
font_01_sfnt_off00006eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 10648 bytes
SHA-256: e5781de444273378e2fbfc60bd3571549efca630ff94c384a38f4d6f4c394588

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