Malicious PDF — malware analysis report

Static analysis result for SHA-256 610164e22a0882ea…

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 04:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e66026eafd98565c9d40b26f2f815b SHA-1: 417bbe590128b53245816d9f101de51cc5629302 SHA-256: 610164e22a0882eac0c3923e4627416db2e2f4c7a9de9a1d5ef4c6b1a3ee01f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. One prominent URL, https://ttraff.cc/wix?keyword=the+combining+form+__________+means+bone+marrow+or+spinal+cord, is flagged as a malicious redirector. The document body, though partially corrupted, suggests a quiz-like format, indicating a social engineering lure to drive traffic to malicious infrastructure.

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=the+combining+form+__________+means+bone+marrow+or+spinal+cord
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1c90dc_4c59d9ffb90e456d8ce5b46489273da6.pdf
    • https://static.usrfiles.com/ugd/1e32c2_230a53ce88e547ae9d5213af581bc393.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e31703808bf4874b7dd69aadd26b9a4.pdf
    • https://static.usrfiles.com/ugd/fb5067_2e09ea0603ad451897b5c38bb3fd4c2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f415b5d794238838a0d95b049f254.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/mibegububuva.pdf
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/crculos_perfeitos_em_minecraft.pdf
    • https://static.usrfiles.com/ugd/b8c837_00191878d2d44b108b73b7e30072052f.pdf
    • https://static.usrfiles.com/ugd/b5aed9_08b3d31c4b774205a0bf90b419b436fd.pdf
    • https://static.usrfiles.com/ugd/5e81b9_f09192f7ee0448d1bff6db57c98952a0.pdf
    • https://static.usrfiles.com/ugd/f0e51d_707d62ccf83a4d168a7144424034cd7d.pdf
    • https://static.usrfiles.com/ugd/822ecd_791e6a6101324c60aa1b8fbb33266141.pdf
    • https://static.usrfiles.com/ugd/b8c837_70edc4e54f334690afd758439b5e4fd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_574b4fec45da492e8caa4cedde46f2f9.pdf
    • https://medlineplus.gov/appendixa.html
    • 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_off00007a6e.bin
d4c3f592643ea18d6b34bd6ac38dc7c51888d17133ebb20fadbd9c540bb40b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E 5780 bytes
font_01_sfnt_off00008e11.bin
b4bba5911dc25d2b620c8dd9d71b6bfd11f0e7f645cfd7f759c6c577e5502a1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 14396 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.