Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf2db0304c5cb83…

MALICIOUS

PDF

70.7 KB Created: 2020-08-05 18:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a2396cdf65c3fbf5affc74cf67b555 SHA-1: 3698486ee7e7faf2da41ddc7df6efb2e8fc7ee95 SHA-256: 3cf2db0304c5cb83b9a18d6f6b29004107b0da367abc56aa1dcfb36272020b1d
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, with the primary malicious redirector being ttraff.ru. This suggests a phishing or SEO poisoning campaign designed to drive traffic to malicious sites. The document body contains obfuscated text and embedded URLs, indicating an attempt to disguise the malicious intent. No scripts were extracted from this sample.

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/pify?keyword=java+swing+notes+pdf
    • http://files.watertheessential.com/uploads/1/3/0/7/130776077/wimaze-senarobipi.pdf
    • http://sanamefir.linetweaker.com/uploads/1/3/1/4/131407233/5693490.pdf
    • http://files.bakerlawga.com/uploads/1/3/0/7/130775704/5316049.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/39240426744.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/8571390963.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/nekabimozejep.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/30155526088.pdf
    • http://files.tpak.people.ua.edu/uploads/1/3/1/0/131070934/8709670.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/kegarorojexatipesag.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/nevefaxofopike.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1873/files/xexazirabawofivivase.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0431/1911/6449/files/wudanenekobabidulekig.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/mejoxulutikupagewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/lepokirodaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/75070076395.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/lerimisidatarevexagawi.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_off0000d8be.bin
9e52474e00bd813133ee5f37abcfeedf4aa0f5966755b0ca42911abd692793d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 5224 bytes
font_01_sfnt_off0000eabb.bin
023448d97d2f1ef5952066e1cb61f945e3220fabe9a9be6a7de25973ff146df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 10212 bytes

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