Malicious PDF — malware analysis report

Static analysis result for SHA-256 faad833b9de94bb5…

MALICIOUS

PDF

46.8 KB Created: 2020-08-15 10:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe4de4b3d187ff0295904a42d88406df SHA-1: 32d92286a0b66f528b7a04e0e4811f4ce230e73c SHA-256: faad833b9de94bb5c82950fcdf015c80bc382deaabee6ab4ae26d03e4d8f5d3a
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create SEO link farms. One of these links, 'https://ttraff.cc/pify?keyword=microbial+biodegradation+and+bioremediation+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=microbial+biodegradation+and+bioremediation+pdf In PDF document text
    • http://files.andersonpurse.com/uploads/1/3/1/8/131856232/c67ea0b6.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/1/0430/3293/6605/files/jolev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0747/3821/files/55605873812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/pivapudadiviru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5223/4917/files/free_printable_deer_coloring_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0388/3157/files/seoul_metro_map_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/new_immunization_schedule_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/aguas_de_marco_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/someone_to_wed_mary_balogh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/bilaxanedenadoxemazeripe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/change_management_tools_and_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/sizun.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 2

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_off00007b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B57 5444 bytes
SHA-256: d135f94d1d600cb5e29bf96c93c2ce7ae219bf53f04ee650a2559a022a3ba30f
font_01_sfnt_off00008dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC2 9548 bytes
SHA-256: 6bc168631ecef16899bf95375cf9b2d76d2a7724513e9ce728cfdc5d335c5d11

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