Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2968d0b16aadd8…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 16:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 150a7f334e4beb4499fcdd8d4617169b SHA-1: 61cb6ed11fca984934c22e7504819e374fd0c1ed SHA-256: 9e2968d0b16aadd8df4d9a97ea09304d1a83dc50ddcc4879e67e4e964a543234
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'sample nanny contract template uk' and the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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.link/wix?keyword=sample+nanny+contract+template+uk
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/febubajobagorudipaxevut.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/solubility_equilibria_chem_worksheet_18-_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/zakesuvava.pdf
    • https://cdn.shopify.com/s/files/1/0462/8407/9264/files/69031160551.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/vorulefu.pdf
    • https://static.usrfiles.com/ugd/906e9f_657316edacb549c8934ae4e74ea5ddd0.pdf
    • https://static.usrfiles.com/ugd/769f78_272756808205483b84f17c11af792953.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/26204396348.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/9577280033.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/1284090859.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/auxiliary_verbs_and_modals.pdf
    • https://static.usrfiles.com/ugd/b8c837_c18c34ad10884e728dd5f90b0d3ff43b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffaf6aa7ab1f4a709616d7d056de0f8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54901a16fa140ae866ad1d87633440b.pdf
    • https://static.usrfiles.com/ugd/930050_a81819ff047f4b43857f030d60449067.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006772.bin
82c091f802f08676280ece9ffd5f2cfa54ae944823050fe5ab36b83049661689
pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 5004 bytes
font_01_sfnt_off0000785f.bin
5b1613c6fb25f532cd87966533d65f10b0375fb4620e29bde708347660d21e62
pdf-font-stream PDF embedded font (sfnt) at offset 0x785F 10584 bytes
font_02_sfnt_off00009c72.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C72 4324 bytes