Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b16685f9a6e6f55…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 14:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5cb89b3448086f705d9d7f13eb24774 SHA-1: f6e77a16ed6981311ec4e5ad29fb91621da1677d SHA-256: 1b16685f9a6e6f55143831fed6d2ca69b8949c727225057996a78ed0c46b74ba
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to benign Shopify-hosted PDFs, but one critical link directs to a malicious redirector at 'ttraff.com'. This suggests the document is part of an SEO poisoning or link farm scheme, potentially to drive traffic to malicious sites or to improve search engine rankings for the linked content. The ML classifier strongly supports the malicious nature of this PDF.

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=servidor+web+apache+linux+pdf In PDF document text
    • http://files.naspain.com/uploads/1/3/1/4/131483108/fazaxusiko.pdfIn PDF document text
    • http://zojobita.colleyvillemsband.com/uploads/1/3/1/3/131383949/2406536.pdfIn PDF document text
    • http://files.usanaapconvention.com/uploads/1/3/1/3/131398547/5569017.pdfIn PDF document text
    • http://files.workwithpete.net/uploads/1/3/1/4/131453555/4708978.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/1/0436/1152/1187/files/california_wildfires_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/harley_quinn_comic_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/27926765753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1307/9203/files/4308872240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/38822265921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/handbook_of_cathodic_corrosion_protection_third_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3695/files/88233914023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/45091142510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/93089422431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/7534537504.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 4

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_off00006689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 5528 bytes
SHA-256: 81f8dd13a373cb2780dd79118f35fa9095ced8109d924e5a5e3692c95599c65e
font_01_sfnt_off00007968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7968 10512 bytes
SHA-256: 6edf07420804f803904d8efcdfdb59ee4d62c1ef234631f176ddb22bae2a26ca

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