Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e20dd21e2c3da3a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-16 18:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24451b7f2f9312460992a6ea97a92546 SHA-1: 3db305105e4357acb8a8d0477b16878a4a5283e2 SHA-256: 8e20dd21e2c3da3a307dc16b73471ca94fcaabdb1a4679efa4a99c346c596aa5
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify, designed to appear as a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely the initial stage of a phishing or malware delivery chain. The document body contains text related to 'Bluestacks software free latest version' and a call-to-action phrase, further supporting a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bluestacks+software+free++latest+version In PDF document text
    • http://files.keyinmigration.com.au/uploads/1/3/2/6/132695513/senoxipa-vilegevujiko-kopofew-kepanigile.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/1/0433/2234/3577/files/queen_loft_bed_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/nejafototisapufes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/bioterio_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/oxford_phonics_world_1_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/98444870510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/32551263199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8368/files/binary_search_tree_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/12_articles_of_faith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/15106088499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/delete_youtube_playlist.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_off00007322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7322 5140 bytes
SHA-256: a7a543506bb8eaa8932aa357fb8fc5ac464a8987124bebe1bd3d3c35aea6019e
font_01_sfnt_off000084c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C1 11820 bytes
SHA-256: 1aa145d4cfdfd88358f8de42c626fc76947a733f8309200f8b1ad68f9b6eb65a

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