Malicious PDF — malware analysis report

Static analysis result for SHA-256 20aac7da2d150b0b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 15:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afd0a76f9ae5874e6e895d86dcb9817e SHA-1: e2b711afdc0497b97b0339bcc231c92d5b2742d1 SHA-256: 20aac7da2d150b0b080713448f797dbcc8216c9553c7ffdc592921662b166d88
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. The primary malicious URL identified is ttraff.ru, which is used to redirect to a search query for 'manuale fiat bravo 2011'. While the document body is heavily obfuscated, the presence of numerous links, including one to a potentially malicious redirector, indicates a malicious intent to lure users 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.ru/wb?keyword=manuale%20fiat%20bravo%202011 In PDF document text
    • http://files.texasyellowroseguesthouse.com/uploads/1/3/0/7/130776326/2182491.pdfIn PDF document text
    • http://wexokeju.samniquekahalsey.com/uploads/1/3/1/3/131383791/782125.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/1/0433/2240/9125/files/bind_jump_throw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/teramixeloxemuvimesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/albertsons_job_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/38734020405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/white_orchard_gwent_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/tuzus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/xigiwijilow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/lenevanenunoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/samupavosokinexowifowagez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/engine_damage_report_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/learn_arabic_words_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/elapsed_time_worksheet_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/revupufemux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/47419197582.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 3

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_off00005d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D18 5112 bytes
SHA-256: 7648bb5680a2e3d7dbd0bbae8d34ce92d5309d0fc9032e5b4f4d94b7f913f26c
font_01_sfnt_off00006e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10752 bytes
SHA-256: c857e85829cb1baa9cce7e3bd379ee0005e3bd78d3fb4e0f641eac9c6a4601c0

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