Malicious PDF — malware analysis report

Static analysis result for SHA-256 6773083d1fd9c5cf…

MALICIOUS

PDF

49.0 KB Created: 2020-08-20 00:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af81f98f18476554b28a200fd4ccf615 SHA-1: 1bcc3e297681531e8bbfc3c392152d296fb6f3a4 SHA-256: 6773083d1fd9c5cf171699efdd4111bc2b8e23604e45472a4ebface5e219a897
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service identified as malicious. The document body text, though heavily obfuscated, includes a URL that appears to be part of an SEO spam or phishing campaign. The presence of malformed streams and ML classification further indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=achieving+excellence+in+construction+pdf In PDF document text
    • http://files.waianaeassemblyofgod.com/uploads/1/3/1/0/131070192/wasitumifazezux-jitewisoxib-mumisikex-zasusefobikivem.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/1/0432/3698/2944/files/jetaluruwabusuvesegizow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/advanced_excel_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/bharat_gas_connection_transfer_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/45318598540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/adobe_captivate_prime_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/43558910491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/sogemubinazemutevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/71364506049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/19577262495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4375/3879/files/excel_vba_userform_border_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/pitch_perfect_full_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/board_games_download.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_off00008359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8359 5324 bytes
SHA-256: c20f4a7ae1346ab150dbddb84713c1fcb74ca87f565dc30952b99d1b6a500ba2
font_01_sfnt_off00009574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9574 9860 bytes
SHA-256: c3d8f04814d3c94c70f31ebb811320ee61a807f47f361cc0b7217e95ebf39574

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