Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b6acba17ba6c46…

MALICIOUS

PDF

36.7 KB Created: 2020-08-02 16:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 989c2f75452a99102c0398771961c823 SHA-1: 5ff946c3597b296a73cb5f361c339b2e186dc785 SHA-256: e4b6acba17ba6c46cf59aa4d1919c242ece29b148d292e5204e70f59d2041d95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious link, 'https://ttraff.cc/pify?keyword=edelbrock+1406+manual+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the 'edelbrock 1406 manual pdf' and the authoring application 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=edelbrock+1406+manual+pdf In PDF document text
    • http://files.whitecoag.org/uploads/1/3/1/4/131453588/fikutufawob.pdfIn PDF document text
    • http://files.albertahealingarts.com/uploads/1/3/1/8/131860378/bukuxupigadilij_xazezuwur_piguf.pdfIn PDF document text
    • http://files.fudosanbunka.com/uploads/1/3/0/7/130740316/gawor-xokasabu-molelekufinujav.pdfIn PDF document text
    • http://files.goreybypass.com/uploads/1/3/0/7/130740442/bikufuni.pdfIn PDF document text
    • http://files.transformedforlifeuganda.com/uploads/1/3/1/3/131384335/68ed566ff6.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/1/0432/4953/3088/files/15493762007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/babubegorevexupuwis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/1920_hindi_move.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/tejubebuxipajizuxiporov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/38357209067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/pajosejusugug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/92196415273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/39421924075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/sunquest_pro_16se.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_off000050df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DF 5720 bytes
SHA-256: 65c4659f0ce0c1562643f57e8e4c20be85e0cde889b57bd31934f2efb302a17d
font_01_sfnt_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 9852 bytes
SHA-256: 8860aedd49b8d716d621a5c15c764cd4c2c14ea576d4ae4e13c457f83aa8e8f4

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