Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc86ced617b84fb…

MALICIOUS

PDF

48.3 KB Created: 2020-08-18 17:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d6bef505b81f76f60dff1bc20fa529 SHA-1: bb7776a94aeee81a01a067d15bd940cce93140a9 SHA-256: 9dc86ced617b84fb78cc2113ed0459cb433a3c65c4426808aba728d5afc16a34
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 pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely intended for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via the embedded URLs.

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/pify?keyword=vaste+song+audio++mp4
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://wonavagiw.calaveraslafco.org/uploads/1/3/0/7/130776407/5c3faa18e3a.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/51946457408.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/tutux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/angeles_y_demonios_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/sefodaxafagoguzupixaged.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/10055958480.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/every_man_s_battle.pdf
    • https://cdn.shopify.com/s/files/1/0441/3780/8024/files/77608010451.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/petovinepas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/kosapagik.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/55354434983.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d01.bin
28a8c235cd85574293966a60c59ff56513b4c5f2f2643ed3cef9d5640f256bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D01 5204 bytes
font_01_sfnt_off00005eab.bin
2238ae097f8e833e12c8b4e16c2fdc3b806bdedf41eb3371e3d87038a3bdf69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAB 13776 bytes
font_02_sfnt_off000089b9.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 18776 bytes
font_03_sfnt_off0000a75c.bin
05371786b555e2e95b2763ba519c9bb151c5667a2d50081597c495d198190706		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA75C 2620 bytes

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