Malicious PDF — malware analysis report

Static analysis result for SHA-256 1453ad2ff79bef29…

MALICIOUS

PDF

52.6 KB Created: 2020-08-31 16:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d7aa40f88eafe82f9ff1dc7caaad97 SHA-1: 4c070446e78f39b779222152cee60551b863c3bc SHA-256: 1453ad2ff79bef29039320060ef2e8d3880053a214181787a1b823e514325a65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL for the redirector and several benign Shopify URLs.

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=adirondack+furniture+plans+and+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8502/8757/files/55693123811.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/77252123986.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/jirasasujixu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/acute_renal_failure_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5913/4112/files/pdf_to_word_converter_download_crack.pdf
    • https://static.usrfiles.com/ugd/b8c837_447a6753bb234add81661ee07112d95c.pdf
    • https://static.usrfiles.com/ugd/ba3095_7c78f7763cc341598007772046f021e0.pdf
    • https://static.usrfiles.com/ugd/89c6ad_b492d132bdf44d11b35a5ed83ff76b64.pdf
    • https://static.usrfiles.com/ugd/b65acf_3df8c159fff04f13be74148f6221a612.pdf
    • https://static.usrfiles.com/ugd/409ca8_bf1937ee4dbd43558a556b5711e4af97.pdf
    • https://static.usrfiles.com/ugd/0adedf_6732bfac0ad14bd6822569d3cc7309a8.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_11668e34297345ee9fd48fd431776df5.pdf
    • https://static.usrfiles.com/ugd/b8c837_24f7d0fef4b5417e9c7205c9f62d74ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.pdf
    • https://static.usrfiles.com/ugd/362633_fe964b0959e148cba6cf167309d007c0.pdf
    • https://static.usrfiles.com/ugd/db1da1_7de6d2417f094f6aa44d05185e524d6d.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eb9.bin
0e3fc1b7dfa369d1b4a7457562e6a66624ee59402291c703592b2a2cbb0ec617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 5356 bytes
font_01_sfnt_off0000a0dd.bin
d923fdafa8d38cee84993d8831bbfae3925af3e10f4179689ada0e7dfaaea424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DD 11104 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.