Malicious PDF — malware analysis report

Static analysis result for SHA-256 a853100aa7c7ea72…

MALICIOUS

PDF

46.4 KB Created: 2020-09-10 03:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a0a347cab919dc4fd4153ad1e5be87 SHA-1: 840edb190d67816ffd8e556e45ff6afdcf952a33 SHA-256: a853100aa7c7ea72117616382bbf2201826aa7f40988535ef1d704c1804c4932
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. These links likely lead to malicious infrastructure designed to exploit users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=study%20of%20regulated%20power%20supply%20pdf
    • http://mafod.victoriacableart.com/uploads/1/3/0/7/130740558/2027855.pdf
    • http://denufare.for-medit.com/uploads/1/3/0/8/130874175/wuxan.pdf
    • http://letama.resumephenom.com/uploads/1/3/0/8/130814328/ea42bb1c12e2.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6757/files/jexava.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/bentham_utilitarianism.pdf
    • https://cdn.shopify.com/s/files/1/0437/5098/1793/files/33362573667.pdf
    • https://static.usrfiles.com/ugd/289c5e_afedfe27380f4e99aa479a7d5d954a5a.pdf
    • https://static.usrfiles.com/ugd/b3bc21_9814618fb55249079cc35bb536a295f8.pdf
    • https://static.usrfiles.com/ugd/cd1d52_6dd7e4af564e4a2b81d970a26c194e07.pdf
    • https://cdn.shopify.com/s/files/1/0429/1067/9206/files/jufekozojif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/8980202516.pdf
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/bestwap._in_movie_2018_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/rivovu.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_off00006981.bin
f178ca7acffbccc58d80e249c22d38315465e09af09d05484c6711e4aba4f263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 5232 bytes
font_01_sfnt_off00007b78.bin
eea614c012a9391f2e9658533df7f14fb1ffb589c19cc68fd2d6bc72eea6f2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B78 10336 bytes
font_02_sfnt_off00009ece.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECE 4324 bytes

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