Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d821a0d8ba48e8…

MALICIOUS

PDF

37.7 KB Created: 2020-08-15 06:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69590b280f2c3de8678ac1490724a798 SHA-1: eb1cef7399fae4cc0079ce1a20eeb49867a2ea67 SHA-256: 57d821a0d8ba48e80a2afbb4e8201d791833ed7ef85ebe8d8526441dacf5f654
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=mapa%20de%20carreteras%20de%20castilla%20y%20leon%20pdf'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0429/6241/9863/files/57931127461.pdf' being the first identified. The document body, though heavily corrupted, contains fragments of the URL and text related to maps, suggesting a lure to a malicious site.

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/wb?keyword=mapa%20de%20carreteras%20de%20castilla%20y%20leon%20pdf
    • http://files.scrministries.com/uploads/1/3/0/7/130775180/1876969.pdf
    • http://files.thetaoofrudy.net/uploads/1/3/1/4/131438113/4288541.pdf
    • http://files.middleclassmusings.com/uploads/1/3/1/4/131407552/7942486.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/57931127461.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/ab_negative_blood_type_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/73097653718.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/tepafukojidaramawemariw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9576/7706/files/anemia_makrositik_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0453/2374/7483/files/root_cause_failure_analysis_easa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/311367107.pdf
    • https://cdn.shopify.com/s/files/1/0431/7288/8742/files/length_of_vector_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0017/files/45112223076.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/zisipevabatujeruzomexevuj.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_off0000462a.bin
05e53a324e13fd80a0a5c593c3a591b2a8a6c9601c2bcb024f5e2cc828e475a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462A 5044 bytes
font_01_sfnt_off00005761.bin
a49256ec77c3625a970da78c9460f9cfe7d9df4100c2024c7b136d5b31d62a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5761 11336 bytes
font_02_sfnt_off00007bf3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF3 4324 bytes

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