Malicious PDF — malware analysis report

Static analysis result for SHA-256 81830ec65da0807a…

MALICIOUS

PDF

50.0 KB Created: 2020-08-17 03:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 673eba4d276168a5e6f4c4b26315dd9a SHA-1: 9c1034d66fdeff971293dab0b0fdd0ee14b2ffec SHA-256: 81830ec65da0807a9ab0c711c5bf067ecbe340c8cbbe002e9b4975be4caa15fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The embedded URL 'https://ttraff.cc/pify?keyword=cnn+ireport+map' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=cnn+ireport+map In PDF document text
    • http://files.thefreespiritchurch.org/uploads/1/3/0/7/130776254/7924306.pdfIn PDF document text
    • http://riduxusa.upholsterymelbourne.com/uploads/1/3/1/4/131455734/vorobobif.pdfIn PDF document text
    • http://gorininu.chocolaticity.net/uploads/1/3/0/9/130969862/lejiget.pdfIn PDF document text
    • http://lagetaxe.jambo59.com/uploads/1/3/0/7/130739553/12bae9a6.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/1/0430/3909/6986/files/2191520833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/spatial_intelligence_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/jesawakapededefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/water_supply_and_pollution_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/au_bonheur_des_dames_emile_zola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/sakanirezevudaledirodimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/refrigeration_air_conditioning_and_heat_pumps_fifth_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/67699670212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/final_acceptance_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7303/files/56955362642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/jebodofavesewumiw.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
🗂 Part of campaign: acscmerch.com 7 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7265 4660 bytes
SHA-256: 5e76aa05c631e866610751a1f262e7cdcf54e7c6f3dcd4c58c2ce93ac899120f
font_01_sfnt_off00008219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8219 9996 bytes
SHA-256: 4eaf864acd4e9e14ed8b965e5da186738a9fcba1f50d29454d2607cc7b6d7252
font_02_sfnt_off0000a4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A0 16672 bytes
SHA-256: b673a9042c08ad044e83fdc68571913179ecaa26e8052125ac103ca410d871d1