Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff42168620575b0b…

MALICIOUS

PDF

49.8 KB Created: 2020-11-03 10:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8cbf9b00dde3ee5ebc1fce5ae5a10168 SHA-1: e77e4b7a3552991308fc756a4a1cc86bbb422500 SHA-256: ff42168620575b0b2c34b4ca21cb3b9c92b6c1441ce0f896c0711d742f1849d6
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirectors and SEO-optimized PDF files, indicating a link farm or phishing attempt. The primary malicious URL identified is https://ggtraff.ru/aws?keyword=bloons+tower+defense+2+unblocked+hacked, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's a core part of the lure. The ML classifier strongly indicates maliciousness.

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://ggtraff.ru/aws?keyword=bloons+tower+defense+2+unblocked+hacked In PDF document text
    • https://xasuvakem.weebly.com/uploads/1/3/4/4/134400919/baridezudifa.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/sozixofeduzaba.pdfIn PDF document text
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/2356458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f870500bbfe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9536/2209/files/sexual_orientation_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/disposable_underwater_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/dedosedemovepinivusamax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4812/4575/files/37928182454.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/imei_changer_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2dfa7a6-c301-4e71-9fe1-2212ea8a2054/fizepo.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/tonuxevokexanaritotizejo.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/wow_classic_says_active_game_time_required.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 5588 bytes
SHA-256: e4871ec9d2397b27ef2d09bbb853e2147922a6be96fb53de5571b45e78f45c92
font_01_sfnt_off00007498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7498 13172 bytes
SHA-256: 1c96223ba829368e39a4438ed0cfef89a45c8db51e054095c0e5539f5684216d
font_02_sfnt_off00009933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9933 9724 bytes
SHA-256: 6f87c9a315e70cfd65c609d05239d6a5cc7ebcef8d685dd00c130d7f9487537c

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