Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ef0ee613171ad6…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 00:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07ad4458bbd90bfe3660d6cd94417ff9 SHA-1: 28c4bee9cc567e5c40c90af31ffec670fcef1a68 SHA-256: 11ef0ee613171ad64d3ac70f0624573ff6084d209d17793c84eb66de29efaf5a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key' and includes the malicious URL, indicating a lure for phishing or malware download. The ML classifier strongly supports the malicious verdict.

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=myspanishlab+mosaicos+answer+key In PDF document text
    • http://files.envsalongrantspass.com/uploads/1/3/1/8/131871614/da0157262.pdfIn PDF document text
    • http://files.littletimmy.org/uploads/1/3/0/7/130740193/ziperukuvoboj_nowez_gajegalapowe_zusimubo.pdfIn PDF document text
    • http://bavipi.houstonmemorialgolf.com/uploads/1/3/2/8/132814930/1866730.pdfIn PDF document text
    • http://tudif.monitheseries.com/uploads/1/3/0/8/130814328/tikuzoriwafigom-sedefo-viletifo.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/1/0431/7554/2950/files/lakelazirubum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/87342256270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/silicon-_germanium_heterojunction_bipolar_transistors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/fiwotuwobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0505/6920/files/bapomikewiwurulewewaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/sentiment_analysis_big_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/tomorevotaxupanof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/fortnite_battle_royale_mobile_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/va_form_21-_8416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/jumijadowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3762/files/87748742033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/63133201948.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 4

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_off0000759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 5576 bytes
SHA-256: 44bfa3510708d572c56d820de8c1fd80eee1099dad9a046fefb2ab71907a5754
font_01_sfnt_off00008879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8879 10708 bytes
SHA-256: 8d93e6e19081871e5122c2b64fa54dbe45a7edea49b399221c238b64cb495463

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