Malicious PDF — malware analysis report

Static analysis result for SHA-256 8304cc9c554e97c3…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 16:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6180a3276b23c34147ebc56f6a3d7ad3 SHA-1: f2e4ed7fb69fc443f8996fc68715351c03db2253 SHA-256: 8304cc9c554e97c3db8bcb279ddaab3def95364b72a8a24d0e61b67ff3f8c9b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector to a malicious URL, disguised as a school admission form. The ML classifier strongly indicates maliciousness. The embedded link farm suggests an attempt to distribute malicious content widely, likely for phishing or malware distribution.

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=school+admission+form+format+in+word In PDF document text
    • http://files.thecryingblondegirl.com/uploads/1/3/0/9/130969505/956c8.pdfIn PDF document text
    • http://files.ripplingheartsstudio.com/uploads/1/3/1/3/131383398/xavabinuroji.pdfIn PDF document text
    • http://files.kamariawilliams.com/uploads/1/3/1/4/131453109/sejajuzatuwef_seguxawex.pdfIn PDF document text
    • http://tuvagakif.irismeade.com/uploads/1/3/1/4/131407945/9289048.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/1/0431/4539/6386/files/rejukalifujosukorivele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2960/5024/files/berlitz_test_level_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2533/8265/files/all_formulas_of_maths_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/rudoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/13008632824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/werojogerepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/pixeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/tiduzeresavuwuzedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/bakekiwa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81ED 5124 bytes
SHA-256: e00ca2bbf924648f695d4f9f20c86caa70f8bddf3c22d0c209cb6bd4e7b6580b
font_01_sfnt_off00009328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 9852 bytes
SHA-256: 6de1f109ff19da15e6b7cb7f7d362fe111f4ce3056164e4c8795cc2530cd8003
font_02_sfnt_off0000b4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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