Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73f8612cd4947c6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-22 16:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 259ac32422616ecbbe0e0c7341c54dae SHA-1: 0d61f5e6ca3e508b2170d82ee4b2fb74abc0abbc SHA-256: f73f8612cd4947c6cd82e5d8b82ff9bd9a9da91024a02d527631dfbb9fc260c0
202 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector link farm designed to lure users.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cdc+group+b+strep+guidelines In PDF document text
    • http://files.anmhomedecorandmore.com/uploads/1/3/2/8/132814906/geralawevixopud.pdfIn PDF document text
    • http://files.brittanyhassandesigns.com/uploads/1/3/1/4/131437149/sadubujulakuv-fuxezorutidibe.pdfIn PDF document text
    • http://files.teachkidsnz.com/uploads/1/3/0/7/130775245/2110030.pdfIn PDF document text
    • http://files.lafontanabocaraton.com/uploads/1/3/1/1/131164568/7143752.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/1/0464/6889/0782/files/present_value_annuity_due_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2383/7856/files/12713158046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/bipevipodejefoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49965391974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/muzup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6836/4702/files/funciones_de_los_organelos_celulares.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/kifojunod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/nadax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2810/6651/files/enlaces_covalentes_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/rudirifibuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/optional_java_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/how_to_program_cox_remote.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_off00006b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 5076 bytes
SHA-256: ce821e54db82be1d3ae9eeb17f64be7da94f5afc3446566fd7886c1fc0c38f2b
font_01_sfnt_off00007ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCD 10576 bytes
SHA-256: 8470114042dc45ecf9af0b8a780171306fd2b84ac69dc0838e5efde716f7e9a1