Malicious PDF — malware analysis report

Static analysis result for SHA-256 e623912b543f04c1…

MALICIOUS

PDF

36.3 KB Created: 2020-08-02 17:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca19273b4da38abb11762953df54622d SHA-1: 62a5942d193045c6367349fc2fb6be38725cd101 SHA-256: e623912b543f04c1a401444325392264d2722f232fedafa03e6a1f09fdef6715
202 Risk Score

Malware Insights

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

The PDF contains a clear lure for a "GPU boost download" and links to a redirector URL. The document also hosts a large number of external PDF files, many of which are hosted on Shopify, suggesting a link farm or distribution network. The primary malicious URL identified is ttraff.ru, which is known for malicious redirector activity. The presence of a "download button" heuristic further supports the malicious intent.

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=gpu+boost+download In PDF document text
    • http://files.bannisterrunning.com/uploads/1/3/0/7/130740033/gimedufa.pdfIn PDF document text
    • http://files.seedsforchangewellness.com/uploads/1/3/1/8/131856271/f866beb8a9e6.pdfIn PDF document text
    • http://files.yourbesthealthbyfriday.com/uploads/1/3/2/8/132816036/narexalixoxavaduruza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/fapopewifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/pewedimazuzapuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/vururofixefufozul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/larabobed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/guvuzidonejawebesovuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/xozolepubopovaxatifokum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/tro_chemistry_a_molecular_approach_3e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/separation_process_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/59520298430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/45439773983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/lopiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4436 4836 bytes
SHA-256: 724e4e2879b15d0f98ff336e78180e8998e19f6053cf52262287aa7ea543767e
font_01_sfnt_off000054bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54BD 9488 bytes
SHA-256: 669d46ec5c247892065db9cb10111f0ffed900eb8c8313520dfc18f5002191e7
font_02_sfnt_off0000751d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176