Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a6ee6c80b39e0a…

MALICIOUS

PDF

40.1 KB Created: 2020-08-13 06:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a9c3d003c9c77ee8065c32a5b165625 SHA-1: 705842b22a4a5d75746d08881299912a0df86027 SHA-256: 37a6ee6c80b39e0a1cceaf9851582f4674b02f48be16c9cc65e21b26befbcc39
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a social engineering attempt to trick users into visiting a malicious site under the guise of accessing a 'music theory and transposing guide pdf'. The document body, though heavily obfuscated, contains the same URL. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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/wb?keyword=music%20theory%20and%20transposing%20guide%20pdf
    • http://wanak.tlblade.com/uploads/1/3/1/1/131164250/3953803.pdf
    • http://disimikag.materials-glasgow.org/uploads/1/3/1/6/131606066/8062396.pdf
    • http://files.topdogracing.com/uploads/1/3/1/6/131606719/livexed.pdf
    • http://files.stahlmennonite.org/uploads/1/3/2/6/132682585/dixixegoletanev-lokigagunojov-rivupejutuwule-visaremuxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/arterial_blood_gas_interpretation_a_case_study_approach.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/zeliwav.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/falling_leaves_adeline_yen_mah.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/wotopumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/celi_3.pdf
    • https://cdn.shopify.com/s/files/1/0452/5365/6738/files/futekiwuxuluxagi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/dicionrio_jurdico_da_academia_brasileira_de_letras_jurdicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/captured_by_a_better_vision.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/notawedeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/67519194814.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/zuwisenemajoveguziv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/99333666293.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9b.bin
37be3c179392f2cb2b6475abb6d6b31ea356825678f75175950180df2c4a2125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9B 5492 bytes
font_01_sfnt_off00006f54.bin
da5ba3cb9b50ed203d680fb08b282d56872ff8b089cdaf6c6d8712352cce93bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 10624 bytes

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