Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd926e7928f90ad…

MALICIOUS

PDF

47.4 KB Created: 2020-08-15 04:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97139fffe0b0750d61fe7678c213e7ee SHA-1: 08c06acce0b47473110cab88abfa43ba49ee8576 SHA-256: 4fd926e7928f90ad960055890777a30f7498836232d7b2c34ad2b7f5a2f16748
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=palestra+alta+performance+pessoal+e+profissional. The document body, though heavily obfuscated, also contains this URL, suggesting it's the intended destination. The presence of a link farm heuristic further indicates a malicious intent to distribute traffic to external sites.

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=palestra+alta+performance+pessoal+e+profissional In PDF document text
    • http://sizavefug.peachyboho.com/uploads/1/3/2/7/132740720/polobixusase.pdfIn PDF document text
    • http://files.alises-bakery.com/uploads/1/3/1/4/131453432/5269184.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/1/0448/5585/3218/files/nirotifipulamewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/fulalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9607/files/gefipenuxanorugif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/58238652988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/fangirl_rainbow_rowell_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/14755066725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/kabezimufopefinabegada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/brainstem_cavernous_malformation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/architecting_the_cloud_michael_kavis.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5060 5164 bytes
SHA-256: 997af70bdc379c6afeb007f980b2cf3104714364c141dbd91657c4465ea8c0d7
font_01_sfnt_off000061cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CF 6196 bytes
SHA-256: e2f0f14c52d8036d24879b63a2de711e6f8831fed7ab99856fffa7280b0d3dfe
font_02_sfnt_off000072e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E1 13112 bytes
SHA-256: 3fae284570cc253fc83b081cbbaa0f4deb9d50599da69b7092409ae5b55a661f
font_03_sfnt_off000099ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99AD 16036 bytes
SHA-256: 0fe8aa14d08365d6f8b61b1bc8ff310bb462f18a21f3c7286266bd86e60ec020

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