Malicious PDF — malware analysis report

Static analysis result for SHA-256 19556fa7b97597aa…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 05:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4b5c7d363c193d6fc8cffa05ad87cdc SHA-1: 645b1cb3cb8b9a36209d082025f801b108ae17dc SHA-256: 19556fa7b97597aa1953426197e3a3bf9bfb4d9813e7a873d844992cf2de7158
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of a link farm. A critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the primary lure.

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=american+english+picture+video In PDF document text
    • http://furiperig.zoppideafcamp.org/uploads/1/3/0/7/130776680/53e818428a.pdfIn PDF document text
    • http://files.clemmonspresbyterian.org/uploads/1/3/1/6/131637043/7b0c5f.pdfIn PDF document text
    • http://files.saintpadrepio.ca/uploads/1/3/1/4/131454505/3812091.pdfIn PDF document text
    • http://tafavabi.abbi.ca/uploads/1/3/2/3/132303035/3509094.pdfIn PDF document text
    • http://files.vivafitsb.com/uploads/1/3/1/3/131383860/zuxireli.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/1/0433/2421/1354/files/21230621215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/art_and_artist_rank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/email_address_that_starts_with_m.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/phd_thesis_evaluation_report_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/folijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/40683743939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/rubuvofejudalavevigoxopuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/acute_glomerulonephritis_post_streptococcal_infection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/49241935962.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 5

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_off00006902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5536 bytes
SHA-256: 4ccba21c8a024f55c2abafdd28db9f7e89e3372f82baf89561e7f480f02809f2
font_01_sfnt_off00007ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA0 10016 bytes
SHA-256: 92ba7bb9016bc546eb356a45d36af95c9b6966c0074ab9cb7d4ae28dbf4ce701

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