Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5776ae096071c9c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 13:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9d2a321e8f93599beee8ef75fcd0189 SHA-1: 1e0f442c36e12e53dd7acec2984c3be7bb189bf0 SHA-256: a5776ae096071c9c69699932a8e639948286e331c812c3fd8bc869b212ad3282
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on domains like 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests a campaign to lure users through deceptive links, potentially leading to further malicious content or exploitation.

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.ru/pify?keyword=aristotle+poetics+tragedy+six+elements+pdf In PDF document text
    • http://sekunuxu.mountainvalleypaving.com/uploads/1/3/0/7/130739835/b8ca25.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/1/0434/8408/6429/files/hcg_diet_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0666/files/appium_desired_capabilities_for_android_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5534/0954/files/online_to_word_typing_jobs_without_investment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/73855757059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/os_aplicativos_mais_legais_para_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/79485595191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/seloda.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_off00005fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDC 5636 bytes
SHA-256: aba27a9feddf7bd7135d43bfcab08c85ef8c8f23ce35d1c7406cb9fcbae01909
font_01_sfnt_off000072fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 10012 bytes
SHA-256: 08e3a5b8c20b8f361a4da7fd166395d47301b513fa1154941d5c34a130c562df

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