Malicious PDF — malware analysis report

Static analysis result for SHA-256 162431267e7536ce…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 01:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6283ea85900f89650e470d9c977bc42e SHA-1: 60e977d44e9963214eac5ca487a1777b6f397aa0 SHA-256: 162431267e7536ceb922733b12528d0cf64eda853b69610a73c4c71ad544af86
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links to external resources, including a malicious redirector at 'https://ttraff.ru/pify?keyword=stihl+br600+parts'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure for users searching for specific parts. The presence of a clipboard command lure indicates an attempt to trick users into executing commands, likely to download further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=stihl+br600+parts In PDF document text
    • http://files.peoplespotato.com/uploads/1/3/0/8/130814187/wuzudewiw.pdfIn PDF document text
    • http://files.thomascreekbaptist.com/uploads/1/3/0/9/130969472/vemowo.pdfIn PDF document text
    • http://files.brightstarastro.com/uploads/1/3/1/8/131856492/8872450.pdfIn PDF document text
    • http://files.rochonsands.net/uploads/1/3/2/6/132695445/2970b2d484bf.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/1/0430/6593/3985/files/vumofevisajumomujaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/tixumip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/battlegear_mod_1._7._10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/gubeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/hamilton_beach_slow_cooker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/copy_file_terminal_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/starting_out_with_c_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/nonijozado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/63971881124.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 5444 bytes
SHA-256: 5ab32e2f2454ca17ae499b8ec5d550fa6419715f2633bcd5002d27380eded902
font_01_sfnt_off00006c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 10592 bytes
SHA-256: 4974a119e55f4d24b6dccd1d86700806af4b8e11a5a9a38f865d280a6b9a648d
font_02_sfnt_off000090d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D1 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502