Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5f1ce306abd56d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 00:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49709dcc3ae3646c4cdf2894cc7e950d SHA-1: fd3eb31394eaa0403e71da994952ba762f7be566 SHA-256: 9a5f1ce306abd56d2ceca326f3b7abe51a60ffc0bef5d5b45fd04b032db30c80
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/wb?keyword=vicks%20v745a%20humidifier%20user%20manual'. This URL is likely part of a link farm designed to redirect users to other malicious or spam content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body itself contains obfuscated text and the redirector URL, reinforcing the malicious intent.

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/wb?keyword=vicks%20v745a%20humidifier%20user%20manual
    • http://files.starlightimagestudio.com/uploads/1/3/1/4/131437775/159b5.pdf
    • http://files.villageofhope.us/uploads/1/3/0/9/130969548/1a0402d4197366.pdf
    • http://files.mr-nash.net/uploads/1/3/1/4/131438448/e6f466e4513ed98.pdf
    • http://bilusir.mychickadeesfuntasticnest.com/uploads/1/3/0/9/130969045/xalebi_bagasi_rijizuvilipal_sovasewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/xivagadezifanojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/kilezadozedageloke.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/9910908827.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/dizavote.pdf
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/materi_training_apqp.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/puzizesukubesapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/getting_closer_to_god.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/disupesido.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/e_a_motors.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_off00006cac.bin
c224d5789851f05e7624ddf1f2f02bd9959c90f8799e3c8492170ac7f47efa77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 5644 bytes
font_01_sfnt_off00007fd4.bin
f3db8736f1881fb58b1b685b26a8e4bfe6d9679759c530f71c5091a7e0580402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 10808 bytes

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