Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64406cbe7f57752…

MALICIOUS

PDF

58.6 KB Created: 2020-09-06 21:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9586ffb5db2d6264ea4989f9a5fdb60 SHA-1: 8cb4c4164364d8d5de013e3cc14043ffb518121d SHA-256: d64406cbe7f57752700d8e4a316dc522377922f883ccfe992d843fc7c995f186
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL. The presence of a link farm further supports the malicious intent, likely to lure users to a compromised site.

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=dark+skies+imdb+parents+guide
    • https://static.usrfiles.com/ugd/5262df_5a8eb230c3e94adf95913da5d030aebc.pdf
    • https://static.usrfiles.com/ugd/3b0c81_ab7e127ceb2d43e493fb12dc9706d279.pdf
    • https://static.usrfiles.com/ugd/f103bb_1450a93102cb41ea810ed077f0a5b202.pdf
    • https://static.usrfiles.com/ugd/85d67f_9acff387f2454d3b8ed397dc10cc4946.pdf
    • https://static.usrfiles.com/ugd/df4650_43be99ed86114cd8a53135eab2b68e4b.pdf
    • https://static.usrfiles.com/ugd/dd6616_eb9fc1760c584a28b9ee490c70dd2335.pdf
    • https://cdn.shopify.com/s/files/1/0440/4455/0294/files/8_ball_pool_hack_2019_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/morubaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/vajizerap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/agriculture_optional_upsc_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7155/files/tapofogubukijikepiwul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6115/7794/files/gebodez.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/39356552437.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/72666114909.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_off00009f3d.bin
3ecdd4ea1960803481dd47889908b4b407be88b1b22a2861478be10dc5957437
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3D 5448 bytes
font_01_sfnt_off0000b1b7.bin
ed21ae62c9750187a3a3236d0df79d33aa5070b80ee3e5e0214d24a3587133f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B7 13860 bytes