Malicious PDF — malware analysis report

Static analysis result for SHA-256 3778aa81a773e6dd…

MALICIOUS

PDF

53.0 KB Created: 2020-08-25 13:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c34c2c17c45734d69cdb2c08cbbe1f11 SHA-1: 4450686dc89a34dbec6e0921c22e96021a5b850d SHA-256: 3778aa81a773e6dd0d3c1b9260bb194097c50587c24d691ab44ae1dc81688276
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Monster Hunter World bow build guide'. This link, https://ttraff.com/pify?keyword=monster+hunter+world+bow+build+guide, leads to a link farm of numerous other PDF documents hosted on Shopify. The presence of a large number of external links and the malicious redirector strongly indicate a social engineering attempt to lead users to potentially harmful content.

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=monster+hunter+world+bow+build+guide In PDF document text
    • http://silefe.jihyunhong.com/uploads/1/3/0/8/130814687/zizeginomuxavegi.pdfIn PDF document text
    • http://files.healthexinternational.org/uploads/1/3/1/4/131406840/bosab.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/1/0434/0324/7781/files/oxford_word_skills_advanced_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/butterfly_valve_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/71778341766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/68872415725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/81234410713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/affairscloud_current_affairs_weekly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/bidenepurizexarexamelig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/97032828727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/vokezuxuvoxebajojif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/jesunoweruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/gelubasabifu.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

Related samples 8

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_off00006c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 5116 bytes
SHA-256: a5409305544b777d18f77652aa2f2b22173eb5417a036fedc7867e58f40aa74f
font_01_sfnt_off00007dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 16036 bytes
SHA-256: 6e71eec1f6d458778d3d225485332b27010a4d4a65b96c23dc5e9b34d6012efc
font_02_sfnt_off0000af52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF52 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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