Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d518cfbea622f7…

MALICIOUS

PDF

54.0 KB Created: 2020-09-01 21:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe3d60321788871b84441111295b00f2 SHA-1: 49996523843c49af5d6e03f81e1c4779aab22cd7 SHA-256: 67d518cfbea622f7a08c0ee79d2846028e1297b997981a7bd99ff1a879a26268
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised with a seemingly legitimate keyword. The document body, though heavily obfuscated, contains the malicious URL. The presence of numerous external links, many pointing to user-uploaded content, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=material+safety+data+sheet+template+australia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/54fa57_6496e34dea9f41ff8ae8f7e5b59eac45.pdf
    • https://static.usrfiles.com/ugd/8b49c6_1f211cf609ad475fa208027429f7c944.pdf
    • https://static.usrfiles.com/ugd/9757e7_0f93d2a0ffcf4bd4b71c99c664287d49.pdf
    • https://static.usrfiles.com/ugd/b8c837_97cce06393574f1ab9d5dc61c50d7bba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/commutative_rings_kaplansky.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/pandas_read_csv_no_header.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/shinobi_origin_trello.pdf
    • https://static.usrfiles.com/ugd/314c35_8c031121406246fc8fba9b6be1904a7e.pdf
    • https://static.usrfiles.com/ugd/12daa7_9bc783443d0842f3be518ab23f5891fb.pdf
    • https://static.usrfiles.com/ugd/b28ae2_87f173adc629419a81d1152aa9758c38.pdf
    • https://static.usrfiles.com/ugd/c1108c_abdc6e2506e34a70b7f8dd7c40b3189e.pdf
    • https://static.usrfiles.com/ugd/e745be_db0e9b08a5cc4e299a4781841456aae1.pdf
    • https://static.usrfiles.com/ugd/8a419d_57eb010ad815402f9316e30fd306d500.pdf
    • https://static.usrfiles.com/ugd/ab059d_cf57f775e4724d1fb0680dea3b1be9c2.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_off000095a3.bin
c27149579a83fbbd003d0a026625c3d2278bab0934557b8ab3915b8f2c924e0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A3 5388 bytes
font_01_sfnt_off0000a7de.bin
b4c620f0035880e16e6c350349d41cba68ea29ada965f175da71cfe6ff6d6335
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DE 10288 bytes