Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dc92965fe848fc…

MALICIOUS

PDF

40.6 KB Created: 2020-09-01 11:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1678c916557c26f4c631e512929bbff8 SHA-1: 5492347ea61bd79876b96f8bbcb56f4bc576065c SHA-256: 00dc92965fe848fc752fa4f29999a6bdd65de1acaf0870f653c127ca0266a424
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, and the document body, though heavily obfuscated, contains this URL and numerous other links to external PDFs. This suggests a deliberate attempt to lure users to malicious sites.

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/wix?keyword=nonprofit+financial+policies+and+procedures+manual+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/anemia_ferropenica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/arsene_lupin_sax_alto.pdf
    • https://cdn.shopify.com/s/files/1/0454/3139/0364/files/gratis_komplett_porr_nedladdningar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/alimentos_con_oxalato_de_calcio.pdf
    • https://static.usrfiles.com/ugd/bae363_c4bbefe195bf43edb5e7998f119dd67a.pdf
    • https://static.usrfiles.com/ugd/fd3290_2c341583a5ea44b697963fe4f582ee97.pdf
    • https://static.usrfiles.com/ugd/d775a9_1e78c467a7cc4e14a4530dfd4ad842b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e023013883454fd4b69c07d462d57702.pdf
    • https://static.usrfiles.com/ugd/be19e1_2d033d3d5af446e9abeaae090843c49d.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/7863881010.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/wigogodofaxixov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/bjp3_self-_check_2._4_expressions3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/vabomufutij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bijuwosozawubuvenokuzi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5686/files/angles_in_regular_and_irregular_polygons_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a5.bin
232a5189c7f6cb79ac436551874ca479d3d7be3df1bf78f597ec2f117a351bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5268 bytes
font_01_sfnt_off0000727e.bin
97b3d2cc53bf21b814cfe00d567ec78a2f1586ca31918812796b19c222256415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 10148 bytes

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