Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f18ffe1d2b70c2a…

MALICIOUS

PDF

48.5 KB Created: 2020-09-05 01:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b134b48eac8981f81e0b5be05d6edb2 SHA-1: fff4934486461495dee2108d0fd3ba72d1cd6447 SHA-256: 0f18ffe1d2b70c2a72d05ce32b2928d2daa5b5ba29293308afe12744d136a6ad
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'geographics mailing labels template' and the malicious URL, suggesting a lure. The presence of numerous embedded links to external PDFs, many of which are benign, indicates a link farm strategy to obscure the malicious destination.

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.club/wix?keyword=geographics+mailing+labels+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8ebb60_029abfbc41fc4975b04c05f003bc0313.pdf
    • https://static.usrfiles.com/ugd/2f07a1_a057bdd51e0441069c428b69c5e3b161.pdf
    • https://static.usrfiles.com/ugd/7ff653_26f5f6c653204d64b25f850612b29b98.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_a1865d5af5454fe8a913ebfda6300f4f.pdf
    • https://static.usrfiles.com/ugd/fd3290_c6a0ba1058f04c418b7bc3cbdfdacc10.pdf
    • https://static.usrfiles.com/ugd/bb4607_934cf5526db94d45a3dbee2db83cac84.pdf
    • https://static.usrfiles.com/ugd/4bb894_4cd814540ca74652a14a6db9ac32fe32.pdf
    • https://static.usrfiles.com/ugd/3e5d97_582bb41cd7bc42e49312f09030f8f91a.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e5746e514149d78c5df84dd31daff6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0f4b80d85d444b39ac73b639e11c68e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1965/5579/files/blockb_nillili_mambo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/pearson_biology_textbook_teacher_s_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/52731033814.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/forelug.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/pdf_splitter_candy.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_off00007cba.bin
a0c5c3c3f73b07bc5ad27d22bab26cc90c6921767a721c3a8ba7c217c994f644
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBA 5520 bytes
font_01_sfnt_off00008f51.bin
f7c7833e41c431e4fac0ea9608e6f730ccebb76d099fc9d8acec9d412da592bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F51 11104 bytes