Malicious PDF — malware analysis report

Static analysis result for SHA-256 f544d1be2b2c0749…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 02:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecec103d1548f641e86156befb288894 SHA-1: 60062faaf8f16412f7baabffe364d211c7a225b0 SHA-256: f544d1be2b2c07493045f352eddc43a2b8f92660ee07e75cf295dc21b076a687
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 critical link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to the American Psychological Association and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=american+psychological+association+format+pdf In PDF document text
    • http://files.faithlutheranmonmouth.org/uploads/1/3/2/7/132741109/fa333d3645.pdfIn PDF document text
    • http://files.bloodsugarbikemagic.com/uploads/1/3/1/3/131398530/jugonas-mejijudofuzode.pdfIn PDF document text
    • http://files.yorkshirecajun.com/uploads/1/3/0/7/130739204/rewet-sokepuj-fizuroju.pdfIn PDF document text
    • http://files.cedarchestrockport.com/uploads/1/3/2/8/132815882/tevajuvager.pdfIn PDF document text
    • http://files.sweetvanillapatisserie.com/uploads/1/3/2/6/132682239/pixuvusifukifitan.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/1/0433/0727/0297/files/lukekapemaxofojojulazeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/fekide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/71929842306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/19685749436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/wp_config_db_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/35109410240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/fonizijejosemoxovid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/lemisirowerevubaguvix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/79506736111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/87250340547.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_off00007178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7178 5660 bytes
SHA-256: c6d625b18229e21e49ce0114feafc633a12deafb6465fbc23c2cd11833f9b1eb
font_01_sfnt_off00008494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 10260 bytes
SHA-256: 8a7fe505323add7961b01c1db5ffea0e0b0f26137be88e7aebe5b56bcbe7e279

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