Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f78c1484f734340…

MALICIOUS

PDF

47.5 KB Created: 2020-07-31 05:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f028be22f51771eb72137c29d131c0e9 SHA-1: 3bf2e1c127849069cc759d85010dfc6712773519 SHA-256: 4f78c1484f734340cc3ccbb73b4a96ef2eee6a6b59f1428213ade960c76481a7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, many hosted on 'cdn.shopify.com', suggesting an attempt to manipulate search results or distribute content through a seemingly legitimate platform. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures.

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=artificial+intelligence+norvig+pdf In PDF document text
    • http://files.leaningtowertogo.com/uploads/1/3/0/9/130969545/18bb9c463.pdfIn PDF document text
    • http://files.maryjomann.com/uploads/1/3/2/6/132695302/99674.pdfIn PDF document text
    • http://files.eelasor.com/uploads/1/3/1/4/131407977/felivefa.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/1/0428/8954/3836/files/lavikuduvowutiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4229/2391/files/7885155679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fewanisafabazuraganivagak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/rasuvubujojinozajab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/rasigowutab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/79606678554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/4854690880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/86719918339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/12636266487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/92138581252.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5F 4980 bytes
SHA-256: 88283b551f8e475150c6b551e663a2b61dcebde40b34e5abc4971570e3118f91
font_01_sfnt_off00008d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 10560 bytes
SHA-256: 66ab6f98b6dab398f4b631096a17bf3ec38804268fab4bd58557ee1be2ee3202

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