Malicious PDF — malware analysis report

Static analysis result for SHA-256 3282d0c16d19bde9…

MALICIOUS

PDF

47.3 KB Created: 2020-08-29 22:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6a8f51492c76e11f2aa107f43d2e00 SHA-1: e811daa737743160fcb0a8ac7718ebfbc3c75bea SHA-256: 3282d0c16d19bde9a8dd2fb06b7b9c8d55d0b50a5ae21ffd11507cf7121fc901
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via the embedded URL, likely for phishing or to serve further malicious content.

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=ficha+tecnica+chevrolet+classic+1.4
    • https://static.usrfiles.com/ugd/b8c837_b22f59b59907468798f4fda32dbf3f5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c773afb0a1c040b3abcb07471c7f7c08.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1266376baf84cf9b588fbbaa136fb84.pdf
    • https://static.usrfiles.com/ugd/b8c837_31d8b11be27e4e3fba4150704e3391fa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/junofasogonebusaregu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/fillable_personal_financial_statement.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/jezukebonovapomukez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/applied_physics_by_ak_jha_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7225017309e44729c869f52e120b987.pdf
    • https://static.usrfiles.com/ugd/760101_0b8f7a5756354628ad38bb1891af9ff0.pdf
    • https://cdn.shopify.com/s/files/1/0439/3841/4760/files/pujipox.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/employment_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/79682001026.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/80540683441.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_off00006d57.bin
ff1482367cb61fbad16c32e51ff55d9116795bcf78b28a586147dd78fa87b4bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 5076 bytes
font_01_sfnt_off00007e95.bin
f3d24a7ddad06151be70a6185838cb4ce58610ff19e6c2944ce14b708881ee91
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 15400 bytes