Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d57da5731008e…

MALICIOUS

PDF

35.2 KB Created: 2020-08-02 23:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41a2f768d8efe517f7a8f3934ed12ec6 SHA-1: ecc683fa3d7108546ca6c1f8ef2ec8737bbadd09 SHA-256: 612d57da5731008e4eb63e5f52136d5c07aed0e27d5ef910dea41e1cf85bca1d
194 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL, 'https://ttraff.ru/pify?keyword=random+four+digit+number+generator', is presented as a lure. The document body, though heavily obfuscated, contains references to this URL and appears to be part of a link farm strategy, as indicated by the PDF_SEO_LINK_FARM heuristic. 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.ru/pify?keyword=random+four+digit+number+generator In PDF document text
    • http://files.serenaashley.com/uploads/1/3/0/8/130814636/7683596.pdfIn PDF document text
    • http://files.leahdanielsbutler.com/uploads/1/3/1/4/131453267/b1850836626fcf.pdfIn PDF document text
    • http://files.lifestylefrugalist.com/uploads/1/3/0/9/130968993/2877159.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/1/0433/4285/6344/files/93789206116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/sejokixobofedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/google_chromecast_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/18465072166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/17031520490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/lukazojafilutizagifufusel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/permutation_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/78305727276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/zugobotuliwobutuwuzarigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/18810165552.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 3

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_off00004868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4868 5164 bytes
SHA-256: 309e8a1ca04546ae601a02717eb475bd1b44435bf8ef89ea1259c3ad812e3714
font_01_sfnt_off000059ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59EE 12092 bytes
SHA-256: 075a32177299e12c88f75c3a8ee83453d2ed5b237d9c4b140d6076b4c862345c

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