Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e41837941b51ac9…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452d0e031521b1e7d1b6bd9db345c2a3 SHA-1: 639dc0b938bf13e9a92a9f69b915b947a40c1237 SHA-256: 4e41837941b51ac9b0800ba632715cbbe9f04cb6e64c3ac6cc777d2fea069c1b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Monster Hunter World' and the malicious URL, suggesting a lure to entice users to click on the malicious link. The presence of a link farm further supports the malicious intent of redirecting users to potentially harmful sites.

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/wix?keyword=monster+hunter+world+flinch+free
    • https://static.usrfiles.com/ugd/f09a9d_286f86cb15814476bb34d3fdc69a054c.pdf
    • https://static.usrfiles.com/ugd/5e81b9_77b09de51d57423dbf1f6eeaa82f9d2d.pdf
    • https://static.usrfiles.com/ugd/2074c9_ad0f713b5a8c45479c0d49550e40a776.pdf
    • https://static.usrfiles.com/ugd/4725f1_113e38dda5424e5fbe0c9a8ecc833ff4.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/86866148693.pdf
    • https://cdn.shopify.com/s/files/1/0440/8632/9509/files/virtualbox_mouse_capture.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/getting_to_yes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/69667145434.pdf
    • https://cdn.shopify.com/s/files/1/0462/6707/2669/files/tubifovizoxekanojuzuporit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/wudegonironokonesewabaviv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/54793170915.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/54286110104.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/bharat_ko_jano_2020_book_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/78551530631.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/gd_t_pocket_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/low_oxalate_diet_for_kidney_stones.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/74473424165.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/invertebrate_paleontology_books.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b2e.bin
9a6aa170e9a0e0e082ba1a099c26ccdad105fa0a8012214935176d980f4d6974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2E 4440 bytes
font_01_sfnt_off00005ad5.bin
d2b8e4bac069016fb148a175801f46ae83ddca224c3a3c6685a781ef124b7c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD5 4876 bytes
font_02_sfnt_off00006b76.bin
e565ac99480dbaa7747bc0d8679fd0bfbd850fb42c664e51c0a7e90fa855735a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B76 9700 bytes
font_03_sfnt_off00008c8f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 4324 bytes

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