Malicious PDF — malware analysis report

Static analysis result for SHA-256 64530b61bf4f1a58…

MALICIOUS

PDF

44.4 KB Created: 2020-07-13 01:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c86a48fbbcced869dcf15edc520097c9 SHA-1: 49c6e55ab1be030d854fa68e16216cf879646673 SHA-256: 64530b61bf4f1a58b010bef6a574ba7898031239dc423b5686bc1a1f8bbc19a0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to redirector infrastructure like 'ttraff.com'. This indicates a link farm designed to obscure the final malicious destination, likely a phishing page or malware download. The ML classifier also strongly flagged this PDF as malicious.

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=beginner+calisthenics+workout+for+mass In PDF document text
    • http://files.christianmemoirs.com/uploads/1/3/0/7/130739740/riraxom_rodugarafo_kepinezoz_texemivikutuliw.pdfIn PDF document text
    • http://files.barnontheweb.com/uploads/1/3/2/3/132303209/c6c900fbf902c31.pdfIn PDF document text
    • http://files.contemporarydancemethod.com/uploads/1/3/0/7/130740573/88659ff0.pdfIn PDF document text
    • http://files.imastormtrooper.com/uploads/1/3/1/3/131383283/533ff3b31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lobubun.files.wordpress.com/2020/07/83645359636.pdfIn PDF document text
    • https://xowagibiwu.files.wordpress.com/2020/06/sabupew.pdfIn PDF document text
    • https://tefejudetuni.files.wordpress.com/2020/07/65873572112.pdfIn PDF document text
    • https://jekevak.files.wordpress.com/2020/07/17738167191.pdfIn PDF document text
    • https://fopumetuleg.files.wordpress.com/2020/07/987665498.pdfIn PDF document text
    • https://rifilaru.files.wordpress.com/2020/07/pugeketowexukitaja.pdfIn PDF document text
    • https://xirobeparaz.files.wordpress.com/2020/07/xesataluvure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/63598962771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/denizozufofinire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/60573610376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/subatebilimikakolabubufex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.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_off00006f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 5384 bytes
SHA-256: 462c1454479fac43ca7b61cfe731abed1be6bf412c43248134d19c71acef2f76
font_01_sfnt_off000081ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 10176 bytes
SHA-256: 322a5372ad6d703e8d840e369281dcae30b870bb5254d2c6f71eb7f55e01bd0b

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