Malicious PDF — malware analysis report

Static analysis result for SHA-256 788b01af46f6bbb9…

MALICIOUS

PDF

34.2 KB Created: 2020-08-08 20:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9d0e3348a1cb3fa72f78ef40c39a17f SHA-1: 8c922fad5b011801f05ade0846b280b60d6a9c87 SHA-256: 788b01af46f6bbb9090db2e49d5c3e26aa045539db8440ea5fa807c324277320
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.com/pify?keyword=partituras+para+piano+corazon+de+ni%25C3%25B1o+pdf`. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=partituras+para+piano+corazon+de+ni%25C3%25B1o+pdf
    • http://files.thewaveinspired.com/uploads/1/3/1/1/131164375/9136401.pdf
    • http://files.lmnaturalhealth.com/uploads/1/3/1/4/131453823/wunuxiz.pdf
    • http://files.outloudtheatre.org/uploads/1/3/0/7/130775756/xolezixevikopijifi.pdf
    • http://files.feministpestcontrol.com/uploads/1/3/2/7/132740343/mivijez-fakewejopuwuxa-purodimifum-naronepedik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/osrs_earth_altar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/tapamuvot.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/pdf_to_word_converter_download_free_full_version_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/38401678064.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/25818400702.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/icd_10_code_for_bunion.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/zikiro.pdf
    • https://cdn.shopify.com/s/files/1/0448/2806/5949/files/juwesopexunufinibumakufu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/sela_turcica_parcialmente_vazia.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/amazing_johnathan_death.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/64709943434.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/kuvosu.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_off000045a5.bin
6e22e5e40cd70fea696ae6b51b9ca4bfbae80c5a12d84abbd15bb031f84d38ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45A5 5380 bytes
font_01_sfnt_off000057c9.bin
e8b3737cab8b911a03fe2d9490bb19dfd3983c8a6a0d43fd400b05a470f7b0db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C9 10424 bytes

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