Malicious PDF — malware analysis report

Static analysis result for SHA-256 6945695e274614a1…

MALICIOUS

PDF

52.6 KB Created: 2020-08-22 22:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921edc52eaf777c948545378cf42d222 SHA-1: 983c14f12a45c739555bcd0ad0d8b8ea01f45c39 SHA-256: 6945695e274614a19006dd85f18ee1921ac257a2b62d288f30b30efd8146f2fb
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector, ttraff.com. The document body, though partially garbled, includes text related to 'piano solo sheet music free printable' and the authoring application, suggesting a lure to disguise the malicious intent. The presence of many external PDF links, some pointing to potentially malicious or unknown domains, further supports the malicious redirector and link farm attack pattern.

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=piano+solo+sheet+music+free+printable
    • http://besimu.louisromegoux.com/uploads/1/3/2/8/132815961/7842684.pdf
    • http://files.katytigersbaseball.org/uploads/1/3/1/4/131437885/zavutavixut.pdf
    • http://sezinu.roadrunnerpizzafresh.com/uploads/1/3/0/9/130969352/2943179.pdf
    • http://files.sherriobermark.com/uploads/1/3/0/7/130775856/6da45d70efb.pdf
    • http://norixe.fastforwardctc.com/uploads/1/3/1/3/131384709/memolasemufipe-kedeladosad-figidegijiwu-bofogigimaxopa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/pobogowavirisosobuvelija.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/widikonudoxutamixip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/guide_michelin_campings_france.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/1278434481.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/katekabosupox.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/somexuvugolafoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/fusionner_des_en_un_seul_document.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2106/files/sopcast_soccer_links.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/59545473817.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/33907874878.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/44358130851.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000789d.bin
ff5dc679930aad8659b89340589859e3233dfeadd4841c2ceab652d0c5cc5cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 5396 bytes
font_01_sfnt_off00008ac2.bin
05e2e256b9c67e02779146c1becc833f77d8927860d336f1718c0274f80fd081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 11176 bytes
font_02_sfnt_off0000b029.bin
84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB029 16100 bytes

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