Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee0ae06cdb27be4…

MALICIOUS

PDF

34.3 KB Created: 2020-09-03 06:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5dfe906786db45d51fdf3252e0661a5 SHA-1: 0ca832539b46aff756bf6a7d74cbd67c70f347d5 SHA-256: 8ee0ae06cdb27be42f4b411cdbc182d43587947bbf1a6a35bc865b55521c4d83
154 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, directing users to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a 'data sheet'. The ML classifier also strongly indicated maliciousness. The presence of a mass external PDF link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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.me/wix?keyword=alucopanel+data+sheet
    • https://static.usrfiles.com/ugd/c34eac_2418e0089d3f49c283a0bd33d14d105e.pdf
    • https://static.usrfiles.com/ugd/76156b_22930e6367b84245bf9b7b13bf966df0.pdf
    • https://static.usrfiles.com/ugd/d902bb_811525fbfd3c46399d1111eae1f63d19.pdf
    • https://static.usrfiles.com/ugd/81d6a4_9ee0f7bc32f44846af099323b51db370.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_514651dfd6114511b15d3026c738fa10.pdf
    • https://static.usrfiles.com/ugd/c1108c_6fa03e05b462478ab105235b37470952.pdf
    • https://static.usrfiles.com/ugd/b8c837_87e67cb6cc884dda9b20febff742b9d9.pdf
    • https://static.usrfiles.com/ugd/aff7ca_5870ccb4ea7549e180bf7cff72de9f0f.pdf
    • https://static.usrfiles.com/ugd/d01287_e63cbc8e19d5487b9c2c2a6dbd387a0e.pdf
    • https://static.usrfiles.com/ugd/0aab01_eaee3f400f994e3f8c8b80293b6be9ca.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/73015352666.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/fusotob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/91715916491.pdf
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/93350600179.pdf
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/kufopewolesakobibasifotes.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_off0000487a.bin
5335024deb9e9acaecde3063ec4d54fb7f1aad4f501deb7a5342af0d17d7335a
pdf-font-stream PDF embedded font (sfnt) at offset 0x487A 5052 bytes
font_01_sfnt_off000059a0.bin
62f5f2d3f0a40dd419dc7d56c13eac1621f9adb2528681d4823d59597aad7c4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 9888 bytes