Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d1d3ddbbc4fcb2…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 12:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97083cf5ee1a89f21afad36e19a582a6 SHA-1: addae50ce80791a3a0f814df80f7cae16656bff6 SHA-256: f0d1d3ddbbc4fcb2079b3fc53bc726e98fdbfaf915aab37a0132d4385000e9b8
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is disguised as an academic resource. The presence of numerous external links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content. 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=introduction+to+statistical+learning+pdf+python
    • http://files.saintmichaelscemetery.org/uploads/1/3/0/7/130775557/bda12192a4f2.pdf
    • http://files.breakingrulespublishing.com/uploads/1/3/0/7/130775758/089a08cc9d08de.pdf
    • http://files.inside-osijek.com/uploads/1/3/1/8/131856333/limunazolorug_wagox_xebawowobowi_xasifomuwob.pdf
    • http://files.sheeshees.com/uploads/1/3/0/7/130775215/xukox_wafajojiz_dexemir_dosobidozu.pdf
    • http://files.lorenasantacruz.com/uploads/1/3/1/4/131407144/8c5301c5de1464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/xogaxuwikexiluvevofuse.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/fulikamozavomaxunabitiker.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/73543202886.pdf
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/jerabulufolenavavegaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/lenomogof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/mudolakuzaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/11667069497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/tikabugizekamedazuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31056735454.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/41248391763.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/tesaralewenunagezam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/sojutikiral.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/
    • https://cdn.shopify.com/s/files/1/0434/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007567.bin
9e61bf39d71f6b012cd55d90dcea4bf25b228c5b355104267f23315a9e393760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 5340 bytes
font_01_sfnt_off0000878e.bin
86e58ccb28387b60aef0c5754a6a6c375a01a666560e607be77193a85e29bbdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878E 10352 bytes

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