Malicious PDF — malware analysis report

Static analysis result for SHA-256 165b68bd2e6a5894…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 10:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47ac20f59c4d174d27e0e5ad1a199fbd SHA-1: f34a39cb4850c5ae4c113ee7cc27e3b6126fece5 SHA-256: 165b68bd2e6a58945dedd0f9e5927c50fb7a01f86339c2d8b4e61bff36e2f623
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to a known malicious domain, ttraff.com. The document's structure and the presence of numerous links suggest an attempt to obscure malicious activity within a link farm, likely for SEO manipulation or to host phishing content. No scripts were extracted, but the malicious redirector URL is a high-priority IOC.

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.com/wix?keyword=un+po%25C3%25A8te+sous+pression
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/harbor_breeze_portes_ceiling_fan_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0459/6229/7503/files/bautismo_en_agua_cristiano.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/differentiation_questions_and_answers_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/piriform_ccleaner_registration_license_key_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/cheapest_android_phone_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/aiou_ba_admission_challan_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/wutadalodutak.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/8483825271.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/70864900596.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/48550318794.pdf
    • https://cdn.shopify.com/s/files/1/0449/5346/9083/files/cfa_curriculum_level_1_2020.pdf
    • https://static.usrfiles.com/ugd/67f5f7_64e270bef2014cd3bf39b12a5c3c936b.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_f6e9af1126384498b44f38c5574b40ce.pdf
    • https://static.usrfiles.com/ugd/a1fb72_7c66b651711c425f8be6ef73840cf0f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.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_off0000618b.bin
a20a9aabd22a2b63ba480a01e289e5ca7610162b6294a84a8338ae8b7db216dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 4704 bytes
font_01_sfnt_off00007152.bin
ca53d8436ab2795e58a7a778dbc9d8970dda113f71c68a7e6e37a77904b5f8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 12012 bytes

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