Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc4886dd9908ad9…

MALICIOUS

PDF

41.8 KB Created: 2020-08-16 15:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77c49ce8f8c96dbf1b90d7eda75e79c0 SHA-1: dd5e5fe87fa955906816c12b64dc3ee3d4277a07 SHA-256: 3dc4886dd9908ad9e960d9d91664e242a9ec146c89bc2a76014ed6beeec04544
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'polynomial synthetic division worksheet with answers' and includes the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure, likely for further exploitation or malware delivery. The presence of a malicious redirector URL and a mass of external links points to a link farm or SEO poisoning attack.

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.com/pify?keyword=polynomial+synthetic+division+worksheet+with+answers In PDF document text
    • http://vuradasab.creeksidekennelsgsd.com/uploads/1/3/1/4/131437914/9d030598a4c.pdfIn PDF document text
    • http://files.pianoreflection.com/uploads/1/3/1/3/131379971/29e8aa5dbd52.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/1/0431/1243/1776/files/fajatumalezepogufigelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/1827534973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/59608826910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/fulomonefagof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/learn_english_alphabet_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/6763400636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1595/4855/files/2366476369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/bitevinonugonemiperi.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_off0000590d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590D 5288 bytes
SHA-256: 5bfc2b3299cb3b3a71588feb76d85ac67832738911625e45a956166e6fda3ef9
font_01_sfnt_off00006ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADA 9804 bytes
SHA-256: 894e06931633f91c0c9e066bda89f38911041e6f9b0d12759ac01e38fc73c36a
font_02_sfnt_off00008c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C55 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.