Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7a99783136fbcd…

MALICIOUS

PDF

46.9 KB Created: 2020-08-25 00:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21a9a639b11e22e754e4cb17dae30ab SHA-1: 1f3e88b58c2beda0fc6ad6ca01bbcc909416c876 SHA-256: 7f7a99783136fbcd76c6f1be956f8e533230f168b3b197856ffd4292d3068a2e
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=transferir+contactos+icloud+para+android'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'cdn.shopify.com'. The document body, though partially corrupted, contains the same redirector URL and a Shopify URL, suggesting a lure to a malicious site disguised as a document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=transferir+contactos+icloud+para+android
    • http://files.ctdaus.com/uploads/1/3/0/7/130776407/bededi.pdf
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/200411066.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/35359713925.pdf
    • https://cdn.shopify.com/s/files/1/0439/2789/6219/files/linux_assembly_language_programming_bob_neveln.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/e7_a7_a6_e6_9c_9d.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/waltzing_matilda_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/korurokovaputegakibuxol.pdf
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/mujiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/tigexafefapasitejugesixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/83365532429.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/32499780779.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/tusimavotorubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/como_atualizar_versao_android_tv_box.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006920.bin
6d0fb67991b21ee8cf0a4ef8c00f6871880cab6b0e928d04f9342438f44fa776
pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 4980 bytes
font_01_sfnt_off00007a0c.bin
090e548b2fc4bd25cdb53e738cb5ec7823a55b9901235f0788172cbdd4c09923
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0C 11284 bytes
font_02_sfnt_off00009ef6.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF6 4324 bytes