Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6590ef0f3354db…

MALICIOUS

PDF

39.4 KB Created: 2020-08-24 07:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6072ee07c3c58ab6dda13db6ec9be496 SHA-1: b7a336a9ffd290d42b1b1b4c409f5671d8ee8788 SHA-256: 5f6590ef0f3354dbafaca6477e93ab79a6f715beb613b013d210ba564101aa75
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body and heuristics suggest a lure for a "free download" (archero offline apk), likely a phishing or malware distribution attempt. The presence of embedded URLs and the link farm structure indicate an effort to drive traffic to malicious infrastructure.

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.com/pify?keyword=archero+offline+apk In PDF document text
    • http://mafinon.transactionbankingacademy.com/uploads/1/3/1/4/131483152/8ce7755c.pdfIn PDF document text
    • http://files.lee-chandlerenterprises.com/uploads/1/3/0/7/130740033/2082232.pdfIn PDF document text
    • http://files.thebigfootstudio.com/uploads/1/3/2/6/132695294/fc027f1e658.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/1/0435/1721/4874/files/letter_a_writing_worksheets_for_preschoolers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/91191510844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/47655385109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/47126671867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0295/3629/files/xefotorekemefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/does_turbotax_have_form_5329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/google_maps_api_route_example_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/63421735793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/gafosokexuzomumilokowelaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/38061335150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3151/7592/files/mumofogirudanurififu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/ain_t_no_sunshine_sheet_music_alto_sax.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 6

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_off00005e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E08 4980 bytes
SHA-256: 3ce41ca8a022a0740b2cc37314cca63fc49ac8147ef0b74048b64eab0b9badf1
font_01_sfnt_off00006ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 10024 bytes
SHA-256: 884c177d1bbbbb2160347a0021fc7d2e7c298f3c86de376b693237b31ea5fdb3

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