Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a947d7d0f7d772b…

MALICIOUS

PDF

34.1 KB Created: 2020-09-01 02:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf3b6a92aae4196aa48310c92456875d SHA-1: dbd6d890ee4893486176a7f952ecc16512202392 SHA-256: 9a947d7d0f7d772b23483155f26c3561fd863465c690fc0429bc77fc078dda7c
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a direct link to a known malicious redirector at `https://ttraff.com/wix?keyword=cracking+your+genetic+code+answers`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure via a deceptive query.

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.com/wix?keyword=cracking+your+genetic+code+answers
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/37081187227.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0759/files/girefudupikotumixa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0216/5410/files/63711502253.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/60377137837.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/37797449054.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92835403356.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8275/files/logical_reasoning_books_for_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/leliturugilej.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/balada_para_adelina_richard_clayderman.pdf
    • https://static.usrfiles.com/ugd/b8c837_c18c34ad10884e728dd5f90b0d3ff43b.pdf
    • https://static.usrfiles.com/ugd/76de1a_2142a1cd79224904b58f2ac4ff962ab0.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_20e48ab77f59489ca1e1ab3c823e074e.pdf
    • https://static.usrfiles.com/ugd/b8c837_707dd770c9d44046818d941c272db7f4.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/sefukatukam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/sorexemadux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/rep_function_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/90249006698.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/nugedolexage.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_off000047fb.bin
a1b434a2986621cc0856a15b295a3e616527109b98180191ff61eaaac6def644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47FB 5240 bytes
font_01_sfnt_off000059ee.bin
6bf4115be7464f501a453d9d8f6d04bde513c99d2ee65aacf273a5337cb0fafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59EE 9752 bytes

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