Malicious PDF — malware analysis report

Static analysis result for SHA-256 592767d6272cc9a8…

MALICIOUS

PDF

50.5 KB Created: 2020-08-31 09:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d1d9861f6c61b128c6d626989a868d SHA-1: d63c78c3aecaab808e061ece49b0cb17953306c3 SHA-256: 592767d6272cc9a810b6252778c9896b0a94150946cb79fdb1ab6ea42aa9936a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=spore+patch+5.1+manual+download'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into downloading a file. The ML classifier also strongly flagged this PDF as malicious.

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=spore+patch+5.1+manual+download
    • https://static.usrfiles.com/ugd/136d07_9794bddaefa84c45b28f815f9b6393c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c86a6a768184e918a51f511b9c0e906.pdf
    • https://static.usrfiles.com/ugd/edb4a7_14e5fcdc77764966a91531089b74f71d.pdf
    • https://static.usrfiles.com/ugd/9dda13_0289ed7c30554d2db2bba3a675b783ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c03e11b03fc4f46b2e3868bc0f208f9.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/bujavopuri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/logob.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/bank_of_america_credit_card_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/roxeravedoniwof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7723/1007/files/business_loan_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/alfred_adler_menschenkenntnis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/momuwerabedaku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f6.bin
b04bb9f324123fdacd6c2ebdd2ce61efd795eac509c74119b074a14932d8b922
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 5372 bytes
font_01_sfnt_off00008720.bin
33693e9df7da70c17dd9f6d48745afa887f915440769695d4629fb773c758ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8720 12496 bytes
font_02_sfnt_off0000aeb0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB0 4324 bytes