Malicious PDF — malware analysis report

Static analysis result for SHA-256 01772da0f4cdab87…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 16:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2fcf1f19e7f4073ecdf370d92c433d SHA-1: 9eda3e5a6b9fc29c6786b3c6951f3d6ec4a7bc1c SHA-256: 01772da0f4cdab877f7a0e6368853530c700f4dbb47f8a0b8e9b8e0010822ea2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is designed to lure users to further malicious content. The document also contains a mass external PDF link farm, indicating a potential SEO poisoning or link farm attack. The ML classifier strongly flagged this PDF as malicious.

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=expert+advisor+programming+for+metatrader+4+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_b17ce93c91c3442898b4e0ee7fd53639.pdf
    • https://static.usrfiles.com/ugd/b8c837_c14495fd295b46018a6da430090d5f53.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e091a9e74441d1ab7d59b58a3b6bc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f861ee5715104bb1bcc7f9945812e132.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/1387237303.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/fopigesafedijupodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/research_paper_on_bullying_in_schools.pdf
    • https://static.usrfiles.com/ugd/b8c837_b52de928a3dc467795c003702e94c2be.pdf
    • https://static.usrfiles.com/ugd/b8c837_e31805ad2bf1404c9b482ac49583b423.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5dee3ed256d4d3ba68fd5e3a17e7059.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_262e9fa2ad2549f0b571c09c56b10b16.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4561c2183f94120b0ed500ba06b6d3c.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007345.bin
94a2be4bb93f1d97cb8488df56aa8f0d9440574054652dcd30af3b904f44c8da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7345 5288 bytes
font_01_sfnt_off0000853d.bin
d19c9e967eb775b571428e67c94efcf6b2ca14eb6546a39ae8f66664f4d1c4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 10596 bytes
font_02_sfnt_off0000a949.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA949 4324 bytes