Malicious PDF — malware analysis report

Static analysis result for SHA-256 819f4c58e1c5e430…

MALICIOUS

PDF

33.4 KB Created: 2020-08-24 00:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a5ab2b36d5bc081dc656380b5e5dc03 SHA-1: 152b20aec693fd6740f85cfc53682093189e6b19 SHA-256: 819f4c58e1c5e43011122183e28f0d21759fd3bbad68f7bf8beb921b9cd5989a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common technique for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file's structure and link farm indicate a probable phishing or malware distribution attempt.

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=1happybirthday+song+with+name+telugu
    • http://detek.ahliamun.com/uploads/1/3/0/7/130775320/71e52677394.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/movegibimusix.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/mudujawudefusomeletamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/77711849768.pdf
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/cardiac_catheterization_handbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/xaxikotowelabovot.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/parchment_paper_sheets_15_x_21.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/50812735983.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/35680835568.pdf
    • https://cdn.shopify.com/s/files/1/0463/0960/5541/files/61784264767.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/cicada_shaun_tan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/2006_chrysler_pacifica_owners_manual.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_off000044b6.bin
d8efe974ebeb2c3e0388cc19e18b2acf9ec53be1cb8d9976c6268478fd64f7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B6 5664 bytes
font_01_sfnt_off000057e7.bin
bdb9371e9fa3ac90eba878c2a3ef0fcfd2f074a6dcd14cdb57cd45dccd31684d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E7 9624 bytes

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