Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df1b7c497bbdfff…

MALICIOUS

PDF

43.2 KB Created: 2020-09-02 00:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540632e45f325264bbbf0eecc5d01650 SHA-1: 2f1f9f6aa58b1113dff51ed854f7af3206cdc229 SHA-256: 0df1b7c497bbdffffef4536034672182f803af870f63857b3b2cf79d986b7ac7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics and IOCs, suggesting a lure to a malicious site disguised as a safety data sheet.

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=liberon+wax+polish+safety+data+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/451461_06e1b913f538446bbe746dd4e3ed4e10.pdf
    • https://static.usrfiles.com/ugd/f0f215_37d650b301e34b10a1029830c58b78f6.pdf
    • https://static.usrfiles.com/ugd/565485_4079f65191854f99972da4a1ec1a9adf.pdf
    • https://static.usrfiles.com/ugd/f84671_1b7ff0bfa49741b5ab7d4c83c5d81cc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eb543a0a3fe47a0903e4561e1c80e64.pdf
    • https://static.usrfiles.com/ugd/270e53_c55b070e74ef481cafc07e8303cb44da.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a24bd9f1bc7496996d93b0c6e9612e2.pdf
    • https://static.usrfiles.com/ugd/eaf48f_0a2bd50c9dde4198817bd5b584b687c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4988329c7404ffa87ceea3411f0b592.pdf
    • https://static.usrfiles.com/ugd/6812d7_706e89b224a549439f1fb7e43728e1ef.pdf
    • https://static.usrfiles.com/ugd/822ecd_5a86d5b651bf4f8eb5a823f917fb63b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9e7c9bed2094387a6a135083fc17d9a.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/the_power_of_kabbalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/5937565709.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/kesibuzefidewunexim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/fufadogexik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f89.bin
04a8c0013ce221bb766eb7fc5233d20a653c53832755e9c5826f7663ab5fe1e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F89 5472 bytes
font_01_sfnt_off00007237.bin
54b8a06931f44679a013ca44d74997d9bda38fdd2b4b527add165709908a9439
pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 14932 bytes