Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1078aabcda498c4…

MALICIOUS

PDF

40.3 KB Created: 2020-07-31 19:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82c350b1ec7e94f6fe6ed2a3a68781a4 SHA-1: f4668b9856694a5847a7c10cf148f1360724aa8a SHA-256: b1078aabcda498c4a1e65183c0da96b7760a65c7b7e1d883c03463fd480ba504
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Arraylist implementation in java' and includes the malicious URL. This suggests an attempt to disguise malicious content within a seemingly technical document, likely for SEO manipulation or to trick users into visiting a harmful 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.com/pify?keyword=arraylist+implementation+in+java
    • http://files.tiftcountyshowchoirs.com/uploads/1/3/1/4/131407547/ruzusafetizixewira.pdf
    • http://files.iscypaa.org/uploads/1/3/1/4/131406701/dalov-redanas.pdf
    • http://files.tacalliancedistributors.com/uploads/1/3/2/8/132815791/wezixagipofevulikuja.pdf
    • http://files.ksasteel.com/uploads/1/3/0/7/130739525/wuruvinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/gewiwaroluli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/61606847551.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/dubobolijidideribebiniwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/61484968463.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/38406127864.pdf
    • https://cdn.shopify.com/s/files/1/0428/5077/9295/files/mejanijadepeniresonota.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/xaniv.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/vobewegabopiviwapopu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/kixopulufuwabuvugaden.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/14893167530.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_off00005ebe.bin
b2831aaff43a0f366db0736b95776d80c7fe409006707a6cb409e2d5780d7ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBE 5192 bytes
font_01_sfnt_off00007064.bin
8a45f921f3460e646e1e2056f874ceb6b86b4357067cce0a94c97595f79fc859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 10996 bytes

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