Malicious PDF — malware analysis report

Static analysis result for SHA-256 018e0573bedc16f2…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 11:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c42f79bd6dbb2d66cd15a7e15399cc SHA-1: 073c4dec909de2155c8c8bf4a2355a204eff270f SHA-256: 018e0573bedc16f25225fc97504ba1990873980da319d493b69f760c38a5d16f
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, constituting a link farm. One of the primary links directs to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=grupo+delictivo+a+hermandad+branca'. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, preventing a more detailed analysis of its specific lure.

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=grupo+delictivo+a+hermandad+branca
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3ff21_9c636b99409f452398a86523ce9d0369.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1206fbd2697436f99aac9899033b8ba.pdf
    • https://static.usrfiles.com/ugd/912de2_7d87abd32a6144f88b7b7ee91b20bb8e.pdf
    • https://static.usrfiles.com/ugd/d162e3_525e1dca4c954427b6c78515e73c33f3.pdf
    • https://static.usrfiles.com/ugd/a44510_8ec023b191404144bb8dec002afcbbff.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f34ff608644465497c549119ec35bbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_827da922098545088a16e3430e65f54c.pdf
    • https://static.usrfiles.com/ugd/dcfb95_d87e184be48d414d87506952089348fc.pdf
    • https://static.usrfiles.com/ugd/5b9a87_00f6f9229fed43a5864f97fec8670d11.pdf
    • https://static.usrfiles.com/ugd/469aea_77074464433044e388423b09adc073d3.pdf
    • https://static.usrfiles.com/ugd/930050_215af0b2f2f54201a9271b933bcd3ccd.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5e88d230c347a6a819567be00ac3b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a75f4e8acd8247edba4f7a442beb7b49.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/wowuzidu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/90308019065.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/kipofazumixonigapepibes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/lumoreforejokol.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_off00006952.bin
6e9b471e4198f7109d39c78f9e273b7af24e881d12c872a0d3d3abb57e5adfba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6952 5368 bytes
font_01_sfnt_off00007b6b.bin
d53342a3fe7e09127fb5bd9f4f38e3a7a7ba5f650e6cef8224f2b59d3482c8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 10772 bytes

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