Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aff60e76ce5eb7…

MALICIOUS

PDF

87.6 KB Created: 2020-09-02 09:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ff40fafe553865311b279044a637b59 SHA-1: 29cc49904fc48601cf5b7b9a5b30983c89c7f2ce SHA-256: 06aff60e76ce5eb71a3e82acba1a006fa4b6f51f40eed418c2199f70e3b0f200
194 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple critical heuristics for malicious redirector links and SEO link farming. The document body contains text and an embedded URL that strongly suggests an advance-fee scam lure, aiming to trick users into visiting a malicious site. The ML classifier also provided a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/pify?keyword=dengue+in+pregnancy+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://static.usrfiles.com/ugd/3bf302_6834a9c5ea3d434ebbe8a154256e994b.pdf
    • https://static.usrfiles.com/ugd/b8c837_29761a4f13a847ff9d8959fd0521ee1f.pdf
    • https://static.usrfiles.com/ugd/b910ae_3aca4e3c440d4d34961fe2567d80f877.pdf
    • https://static.usrfiles.com/ugd/affaa6_7960ff7f04cc4de799743658c8aaae2f.pdf
    • https://static.usrfiles.com/ugd/e3834b_ed83def50bc4472ab1940b641ee6af27.pdf
    • https://cdn.shopify.com/s/files/1/0453/8662/9288/files/18350785071.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/balesunoxepuwusarexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/31713605003.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/ketone_allgemeine_strukturformel.pdf
    • https://cdn.shopify.com/s/files/1/0461/1617/6036/files/36277996445.pdf
    • https://static.usrfiles.com/ugd/6c98bc_5d17478ad9e74ab7878a7594acf85e2a.pdf
    • https://static.usrfiles.com/ugd/12daa7_fb6cee5bbf6c4fb683ae8d2312653409.pdf
    • https://static.usrfiles.com/ugd/e745be_ca911f780162474eacbe13d7e67a76aa.pdf
    • https://static.usrfiles.com/ugd/ab059d_c19e32a9b29a4bf48f4b33341adfc887.pdf
    • https://static.usrfiles.com/ugd/f55bec_6f5dbdaa8dcd4075bd62fb0f56b89009.pdf
    • https://static.usrfiles.com/ugd/c8df25_8431748c5b6041da80f41c269701b95d.pdf
    • https://static.usrfiles.com/ugd/4dd980_5672a1c98cef4a1c894208466d5a0612.pdf
    • https://static.usrfiles.com/ugd/39d081_6023df014e044353b8777aa958c61af4.pdf
    • https://static.usrfiles.com/ugd/4117a9_4c324d78d43741b78adeb66aac980cd4.pdf
    • https://static.usrfiles.com/ugd/c3f59f_fd2c48b4ba6e4b5fb9046e2f7ce33d08.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001093e.bin
1b1856c4f414d47584b7056014dc152560a08942fb174482a8b8f5d1860215a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 5340 bytes
font_01_sfnt_off00011b80.bin
0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B80 6148 bytes
font_02_sfnt_off00012b60.bin
90b3efea0c9f3de70b37d4fe199dfe2e73652e8755931dbd668649e8323c8f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B60 10712 bytes

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