Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4595d110bff040…

MALICIOUS

PDF

58.3 KB Created: 2020-08-19 22:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72d5e8bce90c2854ea0fc49a67938c6e SHA-1: 18ea03a291efc6cec6748f5aefd92063c4afde15 SHA-256: 2f4595d110bff040fe8dc8f18996b5910a9db40aa0413b2c8d707851056bd1c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=sepsis+shock+guidelines+2018+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to potentially harmful content under the guise of providing medical guidelines.

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=sepsis+shock+guidelines+2018+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t In PDF document text
    • http://fubixo.climatefx.org/uploads/1/3/1/8/131856907/kazomawukelem.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/1/0432/2154/9217/files/sovipadulupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/zixitevoxapizane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/12318482243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/eating_disorders_powerpoint_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/in_vitro_antidiabetic_activity_of_plant_extract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/33656847587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7796/7776/files/lofepijifemuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/biopsicologia_6ta_edicion_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/39620769279.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 1

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_off00009384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9384 6112 bytes
SHA-256: 4698aa97194dfaba13fd46e87864aaa31e2395aa029c150ee701bd1d084ff5cc
font_01_sfnt_off0000a7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C8 21272 bytes
SHA-256: 34e2e416937c6db10672575c26ed2efa28ef466ffd91d0adf1214856215b14cc

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