Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b47c1deb087a5b…

MALICIOUS

PDF

52.5 KB Created: 2020-08-30 01:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f02481701666f9736ea4856c6142f7 SHA-1: 78e1a1b01b06d5fef9373322b1303a677eabc9b8 SHA-256: d9b47c1deb087a5b813208a984f618c0349a0e174a054b4e3f29c744e04de16e
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=advanced+accounting+pdf+in+hindi'. This URL is associated with malicious redirector infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same suspicious URL and a reference to 'advanced accounting pdf in hindi', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=advanced+accounting+pdf+in+hindi
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/mipofupegavubizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/e_t_p_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0464/0279/7723/files/zapiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4140/7644/files/zuvetofolozifegef.pdf
    • https://cdn.shopify.com/s/files/1/0435/7403/4600/files/bal_hanuman_leela.pdf
    • https://static.usrfiles.com/ugd/57c819_25667570824e4351aaa96b9de355b1ee.pdf
    • https://static.usrfiles.com/ugd/a467d2_3fff5c31eded4fe4a9bea8b104dc4c50.pdf
    • https://static.usrfiles.com/ugd/b8c837_b15a3ae8ae444835aaddf3d67db363c0.pdf
    • https://static.usrfiles.com/ugd/b910ae_0c0b2ee46178444da6d5767740c02e73.pdf
    • https://static.usrfiles.com/ugd/d54300_76eeabf43e6945758d7ddd9038185981.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/7992/files/4_gi_c_th_sch_in_t.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/jevetuwon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/11237473670.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/pugazeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/80471547294.pdf
    • https://static.usrfiles.com/ugd/8b49c6_d1bf0d26e6fb4c50bebb86d35ff66a26.pdf
    • https://static.usrfiles.com/ugd/f46427_dd5dd7fda3454fa0b299147e37aead0e.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_off000066f8.bin
7af3fe6b589d0bc322970aba0b4c834ca2d8524dbf7864c58c6bfbdfad23d084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F8 5160 bytes
font_01_sfnt_off00007890.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 3720 bytes
font_02_sfnt_off000083f2.bin
d7027f2cc543f7433e811b370dc32cf33d007f2bc4fa0bf90b2740a2891bc48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 12184 bytes
font_03_sfnt_off0000aa55.bin
b4be16a73772aebeb9c8356b56a42844d8d39ba0fb0a6f8d5b63a7db2633c150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA55 7764 bytes

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