Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c795af9aae6b22a…

MALICIOUS

PDF

52.7 KB Created: 2020-08-14 17:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa5a0be6943daf52019f20f56d1d41da SHA-1: 0ee0beb1aa24308bbe90de3cdfaab73c959a9de0 SHA-256: 0c795af9aae6b22ad1128a79014fa5bbd6b949a20f6ee6544bced16ae13498bc
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a large number of links to external PDFs, many of which are hosted on Shopify and appear to be part of a link farm designed to attract search engine traffic. One prominent link, 'https://ttraff.cc/pify?keyword=windows+xp+bootable++iso', is identified as a malicious redirector. The document also contains lures suggesting the user copy/paste content into a shell and mentions password-protected archives, indicating a multi-stage attack. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=windows+xp+bootable++iso In PDF document text
    • http://jiluteju.gogaphotographylondon.com/uploads/1/3/0/7/130776757/xawiwirolubo.pdfIn PDF document text
    • http://files.findmyireland.com/uploads/1/3/1/4/131453214/323924.pdfIn PDF document text
    • http://files.bigfootdancestudio.com/uploads/1/3/0/8/130874240/2725605.pdfIn PDF document text
    • http://diwukobom.cervantesprimary.com.au/uploads/1/3/1/3/131384771/demosagoduna-posokuli.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/1/0441/4432/8856/files/tedibalunedelepetowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0087/9515/files/xowuwelopoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/69141974759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/how_to_install_twitter_webhooks_to_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/xonamewesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/catholic_rosary_prayers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/36029855476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/jazavikojubonofumomosovol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/utilitarianism_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/31475981747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/vanunivavibemepijarurusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/wujatikegamasuxufitew.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000917d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 5172 bytes
SHA-256: dcc8bc5ecc7581f118eab0a81e50c56bc401c356f091eeea63c88bb509baec67
font_01_sfnt_off0000a33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33C 10176 bytes
SHA-256: 28da25cec301cb44357ced2e7508a096c9765854b0285b28d7c26e824fe4166c