Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd78d521358691fc…

MALICIOUS

PDF

64.6 KB Created: 2020-08-31 11:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c09b4cb38ee75beda218b7fb9a2c601b SHA-1: 4582e6f7b6a80aa790131e8025d427b6b144bf3d SHA-256: fd78d521358691fc1773d762b1e9983841bd732daa8da6fdfec8cd8172e4e6d2
194 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links, identified as a PDF link farm, likely intended to manipulate search engine results or lead users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, preventing further analysis of its specific 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/wix?keyword=filtro+butterworth+pasa+bajas In 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/1/0429/7919/7081/files/fisalubunodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/ruwodal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/jotatamosujarume.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_23aa52622ae04cd6862ec580406df94f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b444d4_15778f8bfd3e4342bd9fc144f061962b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_a18dbe79455947c9afd0d8a5928d8d18.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f8cea_3262db0799a64dce80c3012a53f59a97.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4609a_9d84a9b21a144b49a7291573b60df113.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e8fe4587652c40f08584ce7fbf0b8d62.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_405855b74b674c658c12944e0a3a9651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/lasizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/87065191215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/nimukajunebidafeduwosufer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 5168 bytes
SHA-256: eccca178fdbff9e9279b6659dc388297b6b493145a59d6d7e1fc3acaea90b9c6
font_01_sfnt_off0000acee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEE 16352 bytes
SHA-256: 887848734ce062ec392006622290e202a973184815acaaade541b91a4aff5b12
font_02_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 16148 bytes
SHA-256: a9f7946c6fb1d9a56c6cb1188e7327a1cde7cd9d6d2f72310ea27776ea41e62e