Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d3d092721df1ec…

MALICIOUS

PDF

46.6 KB Created: 2020-08-22 19:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2239fcad0b3756d536cd966c4d43ee0 SHA-1: d4e953997f67543038c270076085c03fa10a3fe5 SHA-256: 81d3d092721df1ec4646d131915f7af8f7efe9611038af063130717842142ab1
202 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=chat+app+for+android+tutorial'. The document body, though heavily obfuscated, also contains this URL and references to other PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware delivery.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=chat+app+for+android+tutorial In PDF document text
    • http://files.gracechristianmusicfestival.com/uploads/1/3/1/4/131437956/modovudigakejel.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/1/0435/5883/0231/files/libubuferitevajonoren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/inverse_derivative_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/88791263809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/wusibapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/almidon_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5292/8919/files/css_display_inline-_block.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/58336243773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/pradhan_mantri_atal_pension_yojana_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/bucket_elevator_capacity_calculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/25684380706.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 4736 bytes
SHA-256: 10f83f9a49ce3ea99cb8ab8b73e33704942c2d84cc5c9e83f3a4cc5e528d7b50
font_01_sfnt_off00007c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7F 10292 bytes
SHA-256: 54d77279a9c24caa12561f89ec518ed9e4cdce9131eeb337a1a840fbf8abaa07
font_02_sfnt_off00009fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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