Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faa64b3e539893f…

MALICIOUS

PDF

36.4 KB Created: 2020-09-05 01:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f55ce182f5aaae83cd5983fef1264a SHA-1: 18622bea75b2827ce539425746d63032ade9e6f1 SHA-256: 4faa64b3e539893ff23abb92d33b9797469214570600292a0952ecf740945747
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to interview questions and the malicious URL, suggesting a lure for phishing or a scam. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=greatest+weakness+interview+question+answers
    • https://static.usrfiles.com/ugd/e56fe2_15e6e17c263646069000aa326c676ea6.pdf
    • https://static.usrfiles.com/ugd/76de1a_bd7b7c9878a949f6a87044e98ffe7ae8.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_3c7e7d9451004be2a7105e79663385f4.pdf
    • https://cdn.shopify.com/s/files/1/0438/1828/7266/files/basic_tactics_for_listening_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/22291056014.pdf
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/peruboxuwuzinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6520/3093/files/zagesozixavevafig.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/wemekej.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/cardiogenic_pulmonary_oedema_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0452/8803/0370/files/college_board_sat_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/7275300655.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/nebagomatovibofanapawab.pdf
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/pejalumabojelofafimazabad.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/bootstrap_template_for_landing_page.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/bubajulotowotadila.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_off000052fb.bin
c7b9d8ed4f19e92ea780542ca740788a333f01fd363752dc2f224e31d197605d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FB 5020 bytes
font_01_sfnt_off00006440.bin
0392496dd154ea0675388363bfe1b09d0f6bbf09373ba7248767500f3cafd29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 9592 bytes

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