Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d2d7388c0c4e06…

MALICIOUS

PDF

35.2 KB Created: 2020-08-04 03:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 717442d886e20de475ee61fca90648b7 SHA-1: 406e4cbd24af63b3eec735babaab6088c921e8bd SHA-256: 77d2d7388c0c4e065ee23b83852ac3dfb2f528ae9eaff12a48008d8c10d7a5fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to direct users to a malicious site, likely for phishing or to download further malware.

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=balance+ton+quoi+partition+piano+pdf In PDF document text
    • http://files.stuttgartgomath.com/uploads/1/3/2/6/132681827/3e51d35b.pdfIn PDF document text
    • http://files.dogwoodstudiosnc.com/uploads/1/3/0/8/130814907/1ed36b1100ac.pdfIn PDF document text
    • http://tudobas.artscollective.co.nz/uploads/1/3/0/7/130738615/7962e6c20084c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/28952473163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/ruwedisoxitiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/health_economics_charles_phelps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/dapipunonajebedamoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/81411379734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/reverse_linked_list_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/mukizikuxoxafoget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9749/6483/files/jazotajokik.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4002 5028 bytes
SHA-256: 628ac2fb2d389e0ed6394a3e328f82497bd7b2fed35ae98dfcbc458fbb0ef624
font_01_sfnt_off0000511b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x511B 9676 bytes
SHA-256: 4332facf8067873312d27864082cee220878cfa8c8f3e3f02e6333de1816b5b7
font_02_sfnt_off000071ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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