Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a8cedafb5823c8…

MALICIOUS

PDF

44.3 KB Created: 2020-08-31 20:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c4400f9de81645f5e540834a4da6c37 SHA-1: 3b8faadd2ebe94fd1d02b6d2208acfe686087e01 SHA-256: 28a8cedafb5823c827cd8511839ed53aeb801c117169be493c9a74c25bc44245
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=apache+poi+ooxml+3.+17+jar', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lead users to harmful content.

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/wix?keyword=apache+poi+ooxml+3.+17+jar
    • https://static.usrfiles.com/ugd/b8c837_95e5cb01b1154f729be73f86dfc0e7f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2832e418af6d455aae9d5866b4f4d745.pdf
    • https://static.usrfiles.com/ugd/73c254_4ae9ad4c9eb545a2bf31a01f23edc641.pdf
    • https://static.usrfiles.com/ugd/10e3af_c6e6c8a94f62483991f921351a8b8da7.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_eaf929e161704830a620b85b5a4a0a78.pdf
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/xisobamab.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/ben_10_full_movie_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/43025756994.pdf
    • https://cdn.shopify.com/s/files/1/0437/0068/2906/files/fixiguvowemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/89202320954.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/97054909908.pdf
    • https://cdn.shopify.com/s/files/1/0433/7087/2995/files/wematadijoteriz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/18544243419.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/89828945879.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_off00005433.bin
0a8a083f41ce07dd40c3ac71df9bd2615eaed1b83788c44a8e676478c9056824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5433 5056 bytes
font_01_sfnt_off0000656b.bin
1a0532b56492594eae5c646e41a2d94dc59fda7f5a9c1508036a1003c46351d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 14940 bytes
font_02_sfnt_off00009405.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9405 4324 bytes

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