Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a1049f425edfa0…

MALICIOUS

PDF

34.1 KB Created: 2020-09-04 21:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0817590f8dfed94a8c34b295770a9473 SHA-1: c54e06c86f68487a24e43e8d441ae158cee98ab3 SHA-256: 50a1049f425edfa0be8b58d24fd1600e5dae8b4d24c5c6e2bdd1880b3b959836
152 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.link/wix?keyword=coat+of+arms+template+vector, which likely serves as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the coat of arms template and the malicious URL, reinforcing the phishing pretext. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a critical redirector, supports this assessment.

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.link/wix?keyword=coat+of+arms+template+vector
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/nys_notary_public_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/52822541431.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/marathi_kadambari_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/waste_management_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/xuvopedotutupodep.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/stopping_by_woods_on_a_snowy_evening_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/dyson_dc50_parts_manual.pdf
    • https://static.usrfiles.com/ugd/b7ed05_b8f0e9e6df734d2c8786505874e13161.pdf
    • https://static.usrfiles.com/ugd/865d50_a0535a4d4ca9447780a728e28dbd777a.pdf
    • https://static.usrfiles.com/ugd/0f5b72_f37acdcc891f4affa5b6b29777710d53.pdf
    • https://static.usrfiles.com/ugd/a31856_3dfc9b68bdc44974afe4baaa276f6256.pdf
    • https://static.usrfiles.com/ugd/067ecb_914232f19ea84006a4c1223a556beed5.pdf
    • https://static.usrfiles.com/ugd/067ecb_cfbdc89728bc4755b6b6c0c801319338.pdf
    • https://static.usrfiles.com/ugd/f459ea_26a51008bbd94300a61c4f58b7e34a7d.pdf
    • https://static.usrfiles.com/ugd/27135d_e97bf6637379458e8d7d06aff3883d49.pdf
    • https://static.usrfiles.com/ugd/fd3290_61b61f87923b439eaecfc70fcedac48d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a68c19e79ac14cc0a1bd0bc883cb7970.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_off000049b1.bin
493757ce6f4b0e54c8eea2a456b57aaf687c209f5375fd917aeb6134a6196234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B1 5128 bytes
font_01_sfnt_off00005b13.bin
b8158e60dae41a1206c312323ea9b82ea66ef85319a91ede6c4ebbe8bf00483b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B13 9672 bytes

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