Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c58fbabf350456f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 13:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a9ac8d399d4a3ee840b972b79d06c2 SHA-1: 244b8db5a3162da06f5c3fbbdcd8fa2493cc574e SHA-256: 1c58fbabf350456fd16c3c97c39de71217c4101cfee3e7d139c820c21e163279
152 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 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Boom beach hile apk indir cepte' and the malicious URL, suggesting a lure for game-related downloads. The PDF also contains a mass external link farm, with many links pointing to Shopify, likely for SEO manipulation or to host further payloads. The ML classifier also strongly indicated maliciousness.

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=boom+beach+hile+apk+indir+cepte
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/24532466753.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/columns_and_beams_in_building_construction.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/bocio_coloide_nodular.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/40715813705.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/allen_bradley_powerflex_40_vfd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/megad.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/28026160900.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/xelugidapetijusefizin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/toguzubasanol.pdf
    • https://static.usrfiles.com/ugd/c068f8_5350b0ca66e14f818a9d9e47fa4e7818.pdf
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_749a17b404004459add34d26cf91fafd.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce0eb75b390749449b9ce8ebc3cee67d.pdf
    • https://static.usrfiles.com/ugd/b8c837_432cfe9ff0eb48fca92d68034e3bf6a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_138a41a3984743aea227988c9871ca9b.pdf
    • https://static.usrfiles.com/ugd/ea2f88_e35f554f27f84481b6d3acc1f341d5c7.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_off0000559e.bin
0dec982374e0adea087d302104434b85aa5e2fd137b3aa0a7b8d4651681690d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559E 5176 bytes
font_01_sfnt_off000066fb.bin
d7895f59123084757e0722d924ddef957fee90b5502af313f8b50601bf9d22e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 9956 bytes
font_02_sfnt_off0000890c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 4324 bytes

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