Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea57b582203739d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 14:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 311644fd757d22365612ab28477437f2 SHA-1: 4d3d2cc725d1187441fc93211356de7c03ea5b55 SHA-256: 4ea57b582203739dfcb05043346a388760dd86fd4099726d6557b7243e364a35
222 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. A critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bluetooth+app+sender+apk+for+pc'. The document body also contains this URL and mentions a 'download' lure, suggesting the intent is to trick users into clicking the malicious link to download potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=bluetooth+app+sender+apk+for+pc In PDF document text
    • http://files.elizabethhrand.com/uploads/1/3/1/4/131406592/70f28bc48.pdfIn PDF document text
    • http://files.hyderabad.bolgate.com/uploads/1/3/0/9/130969381/kojexeruxafawawesa.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/1/0433/0687/7080/files/12909571685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/sql_server_2008_r2_iso_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/appeal_letter_for_employment_reconsideration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6229/7504/files/46860869392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/automobile_repair_and_maintenance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/wixoneserofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/67284783484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/86945626060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/dukefax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/22565326272.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_off00005b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B21 5356 bytes
SHA-256: 43895491e9ba64bbd9a72fba6f46525933243a7cc9005ade562a4d5bf06b8527
font_01_sfnt_off00006d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4A 10052 bytes
SHA-256: d7f8a0f9c621bbdeafc242f51901030a8ab934bb8a044344b038d0c49ec9ee1c

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