Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd364e055a6dcd3…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 12:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82daeb0153fd0bd4ff618610a0bf7a51 SHA-1: 3e33db550a62b535c638ba5eef612ff290551108 SHA-256: 1cd364e055a6dcd34fa1afc38d60bb3beaa14ba677d02dd22810168c2617adf0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=whatsapp+free++latest+2019'. This URL is presented within the document body, disguised as a lure for free WhatsApp software. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for obfuscation. 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.cc/wix?keyword=whatsapp+free++latest+2019
    • https://static.usrfiles.com/ugd/3bf302_a08ca2de12134a57983ec0ea967e3520.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_6e22e5a340324c40b0f882e812e08864.pdf
    • https://static.usrfiles.com/ugd/64f9d2_7f9886ef170643a088ac1e3f6dab5ede.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/raxagevabovovesur.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/vsepr_theory_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/55793791833.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/causes_of_seizure.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/guzenuxabonazewavaluvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/convert_kindle_drm_to_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/4595/9333/files/41742974942.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/thani_oruvan_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35403674757.pdf
    • https://cdn.shopify.com/s/files/1/0436/0994/8322/files/mabuwekuvened.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3c.bin
229534c047fdc924ae91e24ec4b167b043f0ae7c71535a6b22e3708c96059811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5008 bytes
font_01_sfnt_off00006e5f.bin
01b68cfbd55f941f5227ed0db78bd114a7b80c3c96ae0e2a564904337885ec4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5F 10608 bytes
font_02_sfnt_off000092b8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B8 4324 bytes

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