Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cbfb62c545ca69…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 10:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4859a1425d9e13aed17c5290bf72bb9b SHA-1: 6cb2741160b972b0fd646a8c696f3f8ee863c1b9 SHA-256: 03cbfb62c545ca69faa9d793fba0f4a0f4fd5bf9bc854c29c377fceca9a934df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a movie title, likely a lure to encourage clicks.

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=the+crime+of+father+amaro+2002+watch
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/fokuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/65947044936.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/80774917898.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/83100074650.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/pogoputokuraxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0941/6095/files/inorganic_chemistry_atkins_shriver.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/cisco_9300_switches_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/artritis_reumatoide_inmunologia.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/merge_two_sorted_linked_lists_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/arrowsmith_comic.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58585016777.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3dcc5763c434e5abdffd48afe78c554.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_792ec9d7e9a24bec8b5979653c5e3dc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_37140dbfbf7247529503402fc294ea14.pdf
    • https://static.usrfiles.com/ugd/b9801a_ba3c838a48324139b0bb4eaebf3ce4f7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006992.bin
5a3e62e534b0a063999bc5fd002150b11b12728a77b3b1dc529c23f3d80d2256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6992 4908 bytes
font_01_sfnt_off00007a46.bin
060b9e2840dab5e82bb60e3cddd00092d5f0d31dad42d13172d908afcbf68b0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 11152 bytes
font_02_sfnt_off0000a058.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA058 4324 bytes

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