Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53f00a9eeeb56aa…

MALICIOUS

PDF

50.3 KB Created: 2020-08-18 16:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6137f0dde367758bc59c086ad0afb34a SHA-1: 22cc9e2de6ef890c43d6bee9b754a9e1ace49a6a SHA-256: c53f00a9eeeb56aa932e0940d311c977c71131fa98312033abcb2f3ed90e470a
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, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the redirector. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.com/pify?keyword=bleacher+report+college+football+preseason+rankings
    • http://files.what-women-want.co/uploads/1/3/1/1/131164574/putibe.pdf
    • http://files.martabrysha.com/uploads/1/3/1/3/131380021/1247239.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/67796109981.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/86514955492.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/metanosuxabemozixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6466/3967/files/3d_exporter_for_autodesk_inventor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/94207879377.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/16275503637.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/tafiwapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/vesazejatipunivo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/18795865835.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_off000085c4.bin
712e93f7fc4d25b5f434a37d85f3c0a757e8cefb442bc5255688ee156528a940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C4 5528 bytes
font_01_sfnt_off00009889.bin
0accf847f58444dec698b53af514b4741908adb50911793f384600e3772694c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 10384 bytes

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