Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc978cf5f924e5a4…

MALICIOUS

PDF

53.0 KB Created: 2020-08-19 09:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e34338ed487cd2930834cb1bf1f59499 SHA-1: a4984ef98601fb046d19a24f74a31c63888c2952 SHA-256: bc978cf5f924e5a4171ea1a309ee01462b87d2433f3d9a3c78ad1d8117dbd1d3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious link. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a lure to a malicious site, potentially for phishing or further malware delivery.

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=canny+image+opencv+android In PDF document text
    • http://jogetufor.atouch-ofhealing.com/uploads/1/3/1/4/131406202/1522889.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/1/0436/9684/9051/files/adventures_of_tintin_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/90352178449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/tosekuwisujazekowunavora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/wovikesusevelilajuwizetup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/44599734087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6159/9643/files/53762667498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/13643507412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/tunakodavowakaremixumom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9714/8836/files/pearson_biology_11_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/english_worksheet_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/40402414003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/iaea_report_iran_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.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 1

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_off00008217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 5252 bytes
SHA-256: e2a0bbbc0aa33d1c334358af0f40418f4d878c24857c1810aaaa5f35d87a110f
font_01_sfnt_off000093e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 16356 bytes
SHA-256: a0bfe60db221173cabea6bf7dbabad2261616ef9cb5510a5caef28fd5bd27ead

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