Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d682e23a417e2…

MALICIOUS

PDF

35.4 KB Created: 2020-08-12 00:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80dff9a3bade7c6217f73975518cddd3 SHA-1: 2fa821b519360124c80a08e0fc901af51e632ec4 SHA-256: 1a1d682e23a417e2b6997592c6493a5c5f5dcea2cb8aca754f5ccfa2d0fd5821
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The primary attack vector appears to be tricking the user into clicking a link that leads to malicious infrastructure.

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/wb?keyword=hoja%20milimetrica%20pdf In PDF document text
    • http://verod.canal-art-by-julie.co.uk/uploads/1/3/2/6/132695578/gelulugedib.pdfIn PDF document text
    • http://files.thejansenandrahbekcollection.com/uploads/1/3/0/7/130776326/kinukozewulu.pdfIn PDF document text
    • http://files.babasvegancafe.com/uploads/1/3/0/8/130874066/xogovonodexuwepodu.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/1/0433/0687/7080/files/69143450337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/muserubokoxiros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/nipexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/donafavotoxaluka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/ncfm_mergers_and_acquisitions_module_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8410/3332/files/69660796147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/27854688185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/tuxowakifamadipozifup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/free_aws_solution_architect_associate_braindumps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/top_30_engineering_colleges_in_hyderabad_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/66989143736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/47218562625.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 6

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_off00004e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E82 5160 bytes
SHA-256: 4ed5546ec82990a9984277231a86ce1eb1a94a15ce0160111d526ae8ff103f28
font_01_sfnt_off00005fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFF 9728 bytes
SHA-256: b52f3f2ca33a5c06a62e055cb358f6d3edded43714fac31abbe24dcf35534ab0

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