Malicious PDF — malware analysis report

Static analysis result for SHA-256 4388a4bf325ee3c1…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 05:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3432e0b50a1e7133faf5172574d3f421 SHA-1: 3ac24b84d812337faf4372b9e5881dcd5502784a SHA-256: 4388a4bf325ee3c1a82573128194709bff2eba42651346e8e1d80c46ab781e8e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure, presenting itself as a download for 'Firefox developer edition ubuntu'. It embeds multiple links, with a critical heuristic identifying a redirector link to 'https://ttraff.cc/pify?keyword=firefox+developer+edition+ubuntu'. This indicates a social engineering attack aiming to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=firefox+developer+edition+ubuntu In PDF document text
    • http://revebu.auntyjoys.com/uploads/1/3/0/8/130813821/6f070491b4c.pdfIn PDF document text
    • http://vowoluruw.beechwoodnaturopathy.com/uploads/1/3/0/8/130874493/dimib-zezegoxawiwam.pdfIn PDF document text
    • http://files.ask-noodles.com/uploads/1/3/0/7/130740212/kaxajukuremubu.pdfIn PDF document text
    • http://files.5dmarketingandconsulting.com/uploads/1/3/0/9/130969986/58a76e30b7366.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/1/0433/9440/0414/files/tegevonakinof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/bansidhar_ke_video_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/ecology_definition_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/learning_to_fly_short_stories_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/99869099602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/dijup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/fabrication_of_chainless_bicycle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/kebur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/bexar.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 5

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_off00006a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 4872 bytes
SHA-256: 141d622e122299541895c038d9a3c552561336909589ac6eeb8f6bb10d0330ae
font_01_sfnt_off00007b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 13148 bytes
SHA-256: 7581715bebad2a44ba4c1131ddac31d22f9662ea77df424adae04f0e580ded43

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