Malicious PDF — malware analysis report

Static analysis result for SHA-256 2849bf70412a08a9…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 04:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5694eb1d55d673bb26afe60e90e6a141 SHA-1: 509d4aa7f1c0d2b866143bee1bec78ad63bd295c SHA-256: 2849bf70412a08a9534aa1863287774877930fef0814540aba0926efde97fda7
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of numerous links, including the malicious one, indicates a link farm or SEO poisoning tactic to attract victims. 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=difference+between+array+and+arraylist+in+java+pdf
    • http://files.nature44.com/uploads/1/3/1/4/131406403/9666328.pdf
    • http://files.pikeboarddd.com/uploads/1/3/1/3/131379296/feluzadoseb.pdf
    • http://files.yellowheadauctions.com/uploads/1/3/1/0/131070212/xabalaforiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/79186079532.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/14266069660.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/sotonabixutolukovodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/gugeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/3172776552.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/60483271544.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/41281617763.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/architectural_rendering_software.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/3551412441.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/double_round_robin.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_off000065e6.bin
ecc590198148bb73f4d8836f43fe2f87d52baa0af66ca71519c710363fd2f99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 5296 bytes
font_01_sfnt_off00007813.bin
577516e0c54c96a159457958c6e57aad9b3b62b664cacc44e2bc4a265ea07f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 13852 bytes
font_02_sfnt_off0000a3ea.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3EA 4324 bytes

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