Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d56501109395c54…

MALICIOUS

PDF

40.7 KB Created: 2020-10-09 08:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6ca19215a40e6e7aa031cf795e5b4097 SHA-1: fafd8222959976fc05eaa870f654d096004c2aea SHA-256: 6d56501109395c543797ef54d39782b49374608c3067a285ad595e590686347a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'precision and accuracy worksheet'. The presence of a malicious redirector link indicates an attempt to lead the user to harmful content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/pify?keyword=precision+and+accuracy+worksheet+with+answers In PDF document text
    • http://files.torontopilipinosdachurch.org/uploads/1/3/1/6/131606035/tuger-zegunidulukaf.pdfIn PDF document text
    • http://wusovej.recycledn2yarn.com/uploads/1/3/1/4/131408100/zugofukamemaxon.pdfIn PDF document text
    • http://files.lolagadea.com/uploads/1/3/1/4/131438058/1193230.pdfIn PDF document text
    • http://modix.soddydaisypediatrics.com/uploads/1/3/1/8/131856318/758764.pdfIn PDF document text
    • http://jogex.seanhasey.com/uploads/1/3/1/0/131071277/571aeaba2a1fdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7b7e84-9dcd-4f96-967f-c86d550bf43e/jezesifujexafoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8f14ca-a9b1-426b-9c3f-7c75973fcb05/felukizuwaralilojigef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a2ff7e-2413-4ce2-b6ab-40064a1e9a58/69486397939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/62483186880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9332/7008/files/55787734279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7757/5860/files/bridge_to_terabithia_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7506/2945/files/nimagubagoxepuwize.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_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5252 bytes
SHA-256: 0f643369f4919f651bac058be265e98acdcf2426b2a8bfffc22ba0432835f04b
font_01_sfnt_off00007327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 10212 bytes
SHA-256: 05a75723a8762544b543eaadb891ec7d605820a224dd9320d98a86570e7b2f1c

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