Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec88dfd8847a0e9a…

MALICIOUS

PDF

47.0 KB Created: 2020-08-13 00:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a67e59f492884a322c58c158c213d6c SHA-1: 22e4c6b3ae9fe26cbe29efec2d242a71fb1c9bf7 SHA-256: ec88dfd8847a0e9ae9110095bd52ff8be8f5b9bac12aa1719ae02f23b1d5ab77
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body and heuristics indicate an advance-fee scam lure, attempting to trick users with fake conversion tools. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further 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.cc/pify?keyword=convert+pdf+to+word+document+i+love+pdf In PDF document text
    • http://jorepo.leanderboatclubofhamilton.com/uploads/1/3/2/8/132814930/1362cef4205.pdfIn PDF document text
    • http://files.drhartnell.com/uploads/1/3/1/3/131382673/1081973.pdfIn PDF document text
    • http://files.screenfeels.com/uploads/1/3/1/4/131482864/kuluwuzuso-jiwuwodiror-nugupu-wunaga.pdfIn PDF document text
    • http://komivo.rachellynncory.com/uploads/1/3/1/6/131636612/babezofefu.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/1/0437/7837/5831/files/85937437527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/51193469027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/61178251656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/wirupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/celulas_procariotas_bacterias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/zelobovejez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/nice_guidelines_peptic_ulcer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/sogiwafowuporokip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/47968851641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/zomubavobaxesamorapolegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/99491695238.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 4972 bytes
SHA-256: 9d4cad4dcdeb6a2b7f5777923107cbdf272908c81b30f29b5c846c8fe4c617b8
font_01_sfnt_off00007747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 5748 bytes
SHA-256: 3db88ffa60f98678b3742ffa766e7a42b99d53e0f726889197170a676329e5a3
font_02_sfnt_off00008a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 10596 bytes
SHA-256: 03102474a1a7132e735da0d076b684025a2ce781a5d458ef80acfcf7488e90b0