Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a936e837bfd6899…

MALICIOUS

PDF

50.8 KB Created: 2020-08-27 13:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a7d6c0246c714717c3c686531f6cf79 SHA-1: 4590d0a0e2417b8658ba3cc48281d37ff0e15202 SHA-256: 1a936e837bfd68994484433447d66624bf8db61219574fbbe5b3a6d092162a8b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=gate+rory+mercury In PDF document text
    • http://files.wattsdidierarchitects.com/uploads/1/3/1/0/131070911/gitabomujuxikenapoj.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/1/0434/1674/8188/files/33725537308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/how_to_install_stress_on_amazon_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/fekizozepopusuvomonar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/42232152405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/66634759947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/rugimixuwadumidavabuzal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/36562499071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/sivizifexovagedelaxonoxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/android_sdk_root_tool_on_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/gadufupin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0752/5542/files/60147863014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/median_from_a_frequency_table_worksheet_tes.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56FA 3324 bytes
SHA-256: 823dec3552f9f1e613ba3834a241d290cd03fe40f60db5de255fc60528d9fe3e
font_01_sfnt_off000062df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DF 4868 bytes
SHA-256: 00ac218ef6d9dd1c3bb7ef999c94a8594e4598c192b5563428c41a2c010f1893
font_02_sfnt_off0000735a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 1980 bytes
SHA-256: ff95b1d673811f2341cf9f981d53efadd773d79fdd921fb57a79f0042ccf74da
font_03_sfnt_off00007cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 11304 bytes
SHA-256: e931398f9d7a770581724aa2e0bc1d5c435e971818a8522f7875d548f46cd087
font_04_sfnt_off0000a13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA13D 17708 bytes
SHA-256: 0d4b9c5d58980b69835781fbf5aab154126c99644319b478dc10e21a62f33401