Malicious PDF — malware analysis report

Static analysis result for SHA-256 684efa48fb705ae9…

MALICIOUS

PDF

42.2 KB Created: 2020-09-04 12:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7878537cf3db2cdae5d5566eda6bc75 SHA-1: e1eb6a71ac0c26d2e2e5ae17b0515b5ddac0f451 SHA-256: 684efa48fb705ae9ab8cb606fa7d4f8cced9e81069a13d305400c85408c2f86e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO spam. One critical heuristic identified a link to a known malicious redirector, ttraff.com, suggesting an attempt to lead users to malicious content. 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.com/wix?keyword=gastroenterology+clinics+of+north+america+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/menutewaparogiwul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/anjali_anjali_pushpanjali_instrumental_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/78297717685.pdf
    • https://cdn.shopify.com/s/files/1/0434/5643/0230/files/play_store_kaise_kare_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/software_architecture_and_design_principles_models_and_methods.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/app_cache_cleaner_pro_5._0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/rozevudumojugodedupowi.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_b4174e7cff11415a96704158315a9667.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_86b7fb6d869a40579e73051a2df5399b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ba32c53e07e478bb5d9789dcc64f4a8.pdf
    • https://static.usrfiles.com/ugd/2f7815_0bb097243cb84f309953ceac8a9146b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.pdf
    • https://static.usrfiles.com/ugd/ec0012_7f6c144e01844f22972fe75b39c83618.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4506f7c46214facacc6fc0c8b826402.pdf
    • https://static.usrfiles.com/ugd/d5415a_88f8238d963f40a4bf7a1655ea4603e1.pdf
    • https://static.usrfiles.com/ugd/9f6a24_48ed83c1416d4a6d878e805e84fa6d7d.pdf
    • https://static.usrfiles.com/ugd/1a89c8_a556491c98e74ecd94a18ef2c779e856.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_off00006649.bin
42f229c8861328341b8875de2207f7f2bf8f5e1736a20535304604d1c7add9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 5428 bytes
font_01_sfnt_off000078a1.bin
55f0960ac60fe2bc779cae33a9c0f403ac0e4dabf7cfb0d056f9595290704846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 10356 bytes

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