Malicious PDF — malware analysis report

Static analysis result for SHA-256 5929e8f1111ba158…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 01:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4680ef290d8c0d9cd7996d491afe2a3f SHA-1: 1dc5c2c598024276aafcbfacfda8f66b21345065 SHA-256: 5929e8f1111ba1588492c9f644339e6b8f946ef650b1a296074ee1ccce77ad33
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, many pointing to S3 buckets and Weebly domains, but one critical link redirects through 'traffking.ru' to a page offering 'soak off gel polish at home'. This URL is flagged as malicious and is associated with a link farm heuristic, indicating a phishing or scam lure. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect users 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://traffking.ru/aws?keyword=soak+off+gel+polish+at+home In PDF document text
    • https://sefuzogesosemo.weebly.com/uploads/1/3/4/5/134579576/wudugufexutid-maxofiroz-fefokumodisej-xibetanasadexop.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/2083024.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/zujumuxixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/neviwove/capitals_of_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bacc5f1-5486-46e6-b6c8-684626f37c1f/principio_de_cuantizacion_de_la_luz.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/3d_racing_games_unblocked_at_school.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/wastewater_aeration.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/sibimivule.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/freestyle_skiing_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/90889657495.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/mopolabinusewepomur.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 8

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_off000060d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 5384 bytes
SHA-256: ab65a1c9411383a5dde080ce58633da939b576da4bcb34e48bdfa2feeb9bf620
font_01_sfnt_off00007312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 10576 bytes
SHA-256: 9ebfcd7d606c64c0a5f3c42d86c51e3aa8653197935b74dacc85c0a99361daa6

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