Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f08d2fc4a3b6bd2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 11:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a00d5d061059c397e1bfb890a2d6b56 SHA-1: 076a55c18368b99d5048db2ecd0df7395bc2350d SHA-256: 3f08d2fc4a3b6bd2c0ffaad86ca73a398b927f29c7481ed8e56bef4417c99031
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a mass external PDF link farm, with many links pointing to shopify.com domains. The embedded document body text contains the malicious URL and several benign-looking PDF links, suggesting a lure to trick users into clicking the malicious link.

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=english+synonyms+pdf+file
    • http://files.vietnamcafesandwich.com/uploads/1/3/2/6/132682142/594084.pdf
    • http://files.viktorcage.shop/uploads/1/3/0/7/130738572/469e63f.pdf
    • http://files.michaelpiantadosi.com/uploads/1/3/1/3/131383771/sazasevuburepewoso.pdf
    • http://files.gabriellemoulding.com/uploads/1/3/0/9/130969761/pizumubuzefotusob.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/98625828675.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/fomuzererekevuwin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/xafotaxixidolifurixineseg.pdf
    • https://cdn.shopify.com/s/files/1/0435/9729/9869/files/48089453224.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/nafikopej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/essential_of_corporate_finance_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/latest_curriculum_vitae_samples.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/sql_concatenate_strings.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/webivixo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/84094145704.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/beps_actions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0319/files/30057665298.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_off0000652d.bin
c8778369fcba0542be4bc3d16db3eeaf27ae3c9e6c64e8c18989a05e3fc1184b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 5208 bytes
font_01_sfnt_off000076d5.bin
c90c82e1f7173568931413c18f22ccf3e09987e6978613c831feb5e4d52f573b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D5 10064 bytes

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