Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb421e652e1706e…

MALICIOUS

PDF

52.5 KB Created: 2020-08-15 22:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88b1e46e5d522020e534fbbc583de355 SHA-1: 11bd1ae9088939005328d5e38145e02495c53b54 SHA-256: bfb421e652e1706ec2ab0a0ca7df3b109c70004faf3b5d554e5840bdd6841da7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=approval+sheet+meaning'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to potentially malicious or unknown domains. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting an attempt to disguise malicious activity as a document sharing or information retrieval process. The primary attack pattern involves luring the user through these embedded links to a malicious site.

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=approval+sheet+meaning In PDF document text
    • http://kegivuwa.drlindagedeon.com/uploads/1/3/1/6/131636744/d554611d00.pdfIn PDF document text
    • http://mobov.grandcanyonproject.com/uploads/1/3/0/8/130874655/jakodojad-vevebepimatitot-kafux.pdfIn PDF document text
    • http://files.sunrisesolstice.org/uploads/1/3/0/7/130775921/wobizuvujal_ralob.pdfIn PDF document text
    • http://files.vtiie.com/uploads/1/3/0/7/130738970/8689585.pdfIn PDF document text
    • http://files.msbfitness.co/uploads/1/3/1/3/131381078/nixapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/scarborough_town_centre_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/jurnal_anemia_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/senekonapajameda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8739/6004/files/nanotechnology_slideshare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/poverty_alleviation_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/24183725084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/xofigopiwuvamewemiraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/6283933001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/wimibotitozurotobotor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/kepilazovetupisot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 5280 bytes
SHA-256: 8ce743c3d3af5777169966bc08f7cf693b41626d0afac47a97b18b0d18a93593
font_01_sfnt_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 10364 bytes
SHA-256: 54ec4848617558cb231c3786a0f4c57880574fa1aa5325c021e2e43fe5400ba5
font_02_sfnt_off0000aac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC0 7956 bytes
SHA-256: 43d226eab8adb118df9099a1f4e57ffe54b1777be202027c4d7f70d7646a3c9b