Malicious PDF — malware analysis report

Static analysis result for SHA-256 588fc8ff53cf9c32…

MALICIOUS

PDF

38.9 KB Created: 2020-08-17 18:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f02274dae1764bcd4cc2102718aa18cf SHA-1: b1227b856babb00fccee6ed51d44057d6af7ad32 SHA-256: 588fc8ff53cf9c32bd2e9787c7256e64047f9b630f11ef1604f5e4c654d4fa2a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text related to 'Asthma guidelines south africa' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via these links.

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=asthma+guidelines+south+africa In PDF document text
    • http://files.cordeliabradby.com/uploads/1/3/0/7/130775980/23ad1f67a6c.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/1/0434/3411/5233/files/najutoxavaziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/alelos_multiplos_exercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/avoidant_personality_disorder_case_study.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/tratamiento_de_absceso_cutaneo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/mechanical_aptitude_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/beratu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/jawegavapaxajok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8704/3496/files/gused.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 5424 bytes
SHA-256: af4dc3f464b4570382ece0a089d725413e21c0a5e306931cb69494d161aee860
font_01_sfnt_off00006dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 9860 bytes
SHA-256: b31a13a571ddc7d2cb6320cf8e77ae595a522ac381642d9cfa7b291998da061f

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