Malicious PDF — malware analysis report

Static analysis result for SHA-256 53280680bf31a2a5…

MALICIOUS

PDF

52.9 KB Created: 2020-07-26 15:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540a14b67ddcff93d5a951635fca920f SHA-1: 545e4a5face14071e7ca899ec288c44e8f81c17f SHA-256: 53280680bf31a2a53eee656a6c9ee9e3afbaba474ad8cd5e2455b68d31c715e3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, which is a common SEO poisoning tactic. The primary link points to a known malicious redirector. The document body, though heavily obfuscated, contains keywords related to PDF downloads, reinforcing the lure.

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.ru/wb?keyword=urdu%20novels%20based%20on%20forced%20marriage%20pdf%20download
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • http://files.lilacvillagebb.com/uploads/1/3/1/4/131437531/gamirifusow.pdf
    • http://files.satorico.net/uploads/1/3/1/8/131856827/79a5623.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/40407854994.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/sejoxevajaporegiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/83268256308.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/4484103805.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/3052382620.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/xibojewaxufurimarazuzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/98918613248.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/puribibifidofipaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/lugeguzubug.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/45998102543.pdf
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/penalunopavozodu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/21470459297.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/75654323901.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/30686352204.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/1/0431/2599/7722/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009011.bin
607010041eb6f9b3a8e696b5df074a213c444a83cb7d1fd58dd32b15e14ad3a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9011 5560 bytes
font_01_sfnt_off0000a2ec.bin
62a03c0f416681d41f8af7cae0561cf122cb5f9eec8bc72a65e3a601f022ba44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EC 10224 bytes

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