Malicious PDF — malware analysis report

Static analysis result for SHA-256 996b4b80df63bf26…

MALICIOUS

PDF

39.1 KB Created: 2020-08-25 14:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03b21751eb4b72dbd6431411abf0ae6b SHA-1: f102428c756bb2b2120c82469372e3ef383070cb SHA-256: 996b4b80df63bf26f1f0ce13bfe04af5457cace0fcf849dd1c32f93a2a40501a
222 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a malicious redirector. The document body and heuristic firings suggest a lure related to invoices or payments, encouraging users to click the provided link. The primary link, 'https://ttraff.com/pify?keyword=vyapar+premium+apk', is flagged as malicious, indicating a likely attempt to redirect the user to a harmful site or download unwanted software.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=vyapar+premium+apk In PDF document text
    • http://files.tryfluency.com/uploads/1/3/1/3/131378776/zufumamujunazew.pdfIn PDF document text
    • http://files.sagetribeart.com/uploads/1/3/1/3/131398515/wulelolafipinub-tunevemogonem.pdfIn PDF document text
    • http://fubakus.owsmoonshinecake.com/uploads/1/3/0/8/130874104/7473366.pdfIn PDF document text
    • http://files.villadoradaapartments.com/uploads/1/3/0/8/130815228/wumuzezaj.pdfIn PDF document text
    • http://files.dscarves.com/uploads/1/3/2/7/132712206/651969.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/1/0429/5327/7596/files/app_store_apk_install.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/zezarunivavelorij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/93131840736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/vijuwarifubolokelunojesox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4263/3890/files/9947323500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/assembler_avec_foxit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/dish_flex_pack_channel_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/magiratuvolef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1633/0152/files/dazilitizekusaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/vebufabowozukaxiwojokumak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/spring_framework_specification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/73996302649.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_off00005d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 4888 bytes
SHA-256: 2fe798cae1048065daf770d36b04aaba319976bf9d3bcd3043dd30a0e386ca5f
font_01_sfnt_off00006e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 9936 bytes
SHA-256: f6e5aa7203359d4731b35aeb0f576254b7d7731d507fb0ecd96dc87d8f59f514