Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ad754818dd36e8…

MALICIOUS

PDF

64.4 KB Created: 2020-08-07 13:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7027154b0828a8bdbdf44d2628262e25 SHA-1: 41a212ebac5d72a8734d20f1fb4acc41bb41bc38 SHA-256: a4ad754818dd36e868e24ebfee7c4248590c3d86d1cf25d7673ba5a61b9c33ae
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=eras+protocolo+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf' being one of the first identified. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=eras+protocolo+pdf In PDF document text
    • http://files.opihimaui.com/uploads/1/3/1/0/131070246/pakowipu.pdfIn PDF document text
    • http://files.thetrashtalkblog.com/uploads/1/3/1/4/131408581/4648200.pdfIn PDF document text
    • http://files.rochonlab.ca/uploads/1/3/2/6/132695932/gedifiwekizu.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/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/21300230342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/elemental_impurities_risk_assessment_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/bsc_economics_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3411/1126/files/unqualified_audit_opinion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/52111344190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/0._as_a_fraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/84801635413.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_off0000a92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92E 5108 bytes
SHA-256: 8560766cd94937e85840bb5d17930ed38cd51d14e18c88bc4bd25292276127c4
font_01_sfnt_off0000ba9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9D 10796 bytes
SHA-256: eefb5573e6943133f216f301ccedeebd1f3f4fe310f411a6590bb5414424accc
font_02_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 16224 bytes
SHA-256: 7a7e0f9cb89785dee93ecfbcc78ef93b5a18a5022886c2d5a0bf15d9412c15a0

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