Malicious PDF — malware analysis report

Static analysis result for SHA-256 0453a3634e6c0607…

MALICIOUS

PDF

89.6 KB Created: 2020-08-18 23:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872dd686478e1ec55b2929f4094ebdd2 SHA-1: 42385170c041bb7af6d295d79b56454c42384499 SHA-256: 0453a3634e6c06075f12b2fd02ad6888e57c3a1704482aeb83ccfd8ad4bb3003
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to a 'Japanese hiragana writing practice sheet' and a URL that appears to be a lure. The presence of a download button heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=japanese+hiragana+writing+practice+sheet
    • http://files.ronamaybryan.com/uploads/1/3/1/6/131606056/xowogizaxezikor-tedosadegitafus-texaxozisefi-pupivowuvasis.pdf
    • http://files.noladelicious.com/uploads/1/3/0/7/130775462/wowuvirawobi-dedakivifujig.pdf
    • http://files.happytailspets.co.uk/uploads/1/3/0/8/130814631/jasepuji.pdf
    • http://busenoso.taaonline.org/uploads/1/3/1/6/131606490/ridorapunavuguf-bekor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/10_commandments_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/new_real_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/950882531.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/merubah_file_ke_jpg_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/osrs_magic_max_hit.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/xutufitosovomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/47253637033.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/54082016887.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/35543068576.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/weight_conversion_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/bbc_news_reporter_nina_warhurst.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/absceso_hepatico_amebiano_gpc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bd.bin
44940f5dcf55af0edd2c528e2bbcd8da5131e41aa761aed183657b14e4340364		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 17496 bytes
font_01_sfnt_off00011d26.bin
762c9cb166bcd2cca2b6a56a1cefe8435e66bc58d6bb20b8cdade4b2c677d1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 5244 bytes
font_02_sfnt_off00012eff.bin
3f73729c73009691a5434641517b13c814093590000f1b8152ee91c91a6bc4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 12996 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.