Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e628f5959e06b7…

MALICIOUS

PDF

45.5 KB Created: 2020-08-31 11:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dba0dd36d426a79bb4dc8d61797779e SHA-1: 4105dab45f52bc57c182f74bdca61b02576e3623 SHA-256: 28e628f5959e06b739062ef68efb76d259a021da95dd00848caf6a0267af8d3d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Additions T1059.001 PowerShell

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'construction management 4th edition solution manual pdf' and the malicious URL. This suggests a social engineering lure to redirect users to malicious content.

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/wix?keyword=construction+management+4th+edition+solution+manual+pdf
    • https://static.usrfiles.com/ugd/b8c837_8721ec39ed8242659ef8b3856c7e077f.pdf
    • https://static.usrfiles.com/ugd/575363_b0707a48b22f4edca3e8149095cd4075.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_fe3e7bd5ccaa4f9a8bae881986c53e32.pdf
    • https://static.usrfiles.com/ugd/21a131_321ac6533bb0427b8c44660f8b8251a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8277e1711f864ea2bf9e8915656ae08f.pdf
    • https://cdn.shopify.com/s/files/1/0465/9413/0085/files/toxicwap._com_full_movies.pdf
    • https://cdn.shopify.com/s/files/1/0461/6532/8024/files/nojufisekuzuvokem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/jquery_download_file_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/romurunarovuzugi.pdf
    • https://static.usrfiles.com/ugd/39cb9d_2857a784dca54ba989eeb24a77b12e79.pdf
    • https://static.usrfiles.com/ugd/f09a9d_0efc1ecc72ad4897952d52ee587f5b3c.pdf
    • https://static.usrfiles.com/ugd/5b5da7_4427d7d9d8734c9f90d7ceec642f30eb.pdf
    • https://static.usrfiles.com/ugd/930050_a0111a48cd1041b480b38986d6879f12.pdf
    • https://static.usrfiles.com/ugd/8d57bd_a2e698c9e4a84cddb6e23f145506fe87.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_off00007228.bin
85675e1ad17b9f7938ceaf993a05d58c56a4c7f81651097d70cd46c89ad264c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 5560 bytes
font_01_sfnt_off000084ec.bin
02a751eb80c11889a11fe67fe5337a7c78376d0975663bce8a91079337d5e776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 10728 bytes

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