Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaf5d672bbc7472…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 16:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99329a85a474d2d2c2c12da5afb6c85 SHA-1: 69d9ea455f7dfaf58a9e33ad0ae5b1d1d2928884 SHA-256: 1aaf5d672bbc7472dec5ad0826484186ed47446fd36645d74dbac10af3a95e51
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=cisco+meraki+mx65-+hw+datasheet'. Additionally, it exhibits a PDF SEO link farm behavior, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and other PDF links, suggesting a lure to external malicious content.

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.com/pify?keyword=cisco+meraki+mx65-+hw+datasheet In PDF document text
    • http://zegudojo.flagrantproductions.net/uploads/1/3/1/4/131483453/nonisux.pdfIn PDF document text
    • http://files.stfxgrads.com/uploads/1/3/1/0/131070786/xugifujovodogudir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/81755410578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/fabuvasozuvax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/62162449599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/jajez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/19980047193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3309/9430/files/fetuwanerazarek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/o_reilly_fluent_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/sorusopizisigus.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005011.bin
ba87b6f8c9a44fc2592cdb66df0d1d622c358227d7ec5d6f954262d1a050b1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5011 5588 bytes
font_01_sfnt_off000062f3.bin
a812ae696ba2ece55ae55b3acfd9797c67a5f4b7595fcffbfab1deae2ce28224
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 6360 bytes
font_02_sfnt_off0000739b.bin
245dd91e6b04e52b629fa7a073d3b2fa1f20b702ef747de27546fb686847bc02
pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 14396 bytes