Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad07a83f4d51266…

MALICIOUS

PDF

39.8 KB Created: 2020-08-16 15:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 675de6b7708f2224bb0e914f236fafad SHA-1: c4076667e1399c7a1699862d67d3f43df0eaf9ef SHA-256: 4ad07a83f4d5126661d736e5897ef3481f76cb714b4851e5bed079bc0b155d7d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=anki+ios+free'. The document body also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The overall purpose appears to be directing users to malicious infrastructure under the guise of a software download.

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=anki+ios+free
    • http://files.tworosesphotography.com/uploads/1/3/1/1/131163738/cd955c9c42ea54.pdf
    • http://files.infinityproductionsedu.com/uploads/1/3/1/4/131437967/9304edca6c7d78f.pdf
    • http://maferuko.allaboutfloors.com/uploads/1/3/1/3/131381135/6196163.pdf
    • http://deputo.meadowlark-toys.com/uploads/1/3/2/8/132816091/5f3d6.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/7128144038.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/semuwiripexupurumafukabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/96415724702.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/nejekasabilepu.pdf
    • https://cdn.shopify.com/s/files/1/0445/2987/7151/files/qubee_afaan_oromoo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/mesawuzat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/84377343961.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/23378763802.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0437/6910/2485/files/introduccion_a_la_calidad_total_estadistica.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006002.bin
6c59b3d3842b504fe9fad68f8f35864520fcbf147a75264fa07f35cc0d0e7f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 4572 bytes
font_01_sfnt_off00006f99.bin
29fa116f31b5dba9771e3279918f9c0d02abaf37e7610c252d38b349f3bdbab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 10196 bytes

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