Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b0d2e2a0183483…

MALICIOUS

PDF

49.3 KB Created: 2020-08-14 00:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02a826622f9bc5f5e1c01beba3d9efd7 SHA-1: e54524b0292606bc972c158698132ea1b15c94d8 SHA-256: 82b0d2e2a0183483e97f126833c3b7cfe4377b2369b949abbb6418c1a4d6d1ad
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDFs hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=camicie+nere+uniforme, is identified as a malicious redirector. This suggests a campaign to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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.ru/pify?keyword=camicie+nere+uniforme
    • http://files.myelitestaffinggroup.com/uploads/1/3/1/4/131437379/pabukim.pdf
    • http://teleto.hypnosisforbalance.net/uploads/1/3/1/3/131398020/rarorarexim.pdf
    • http://zapalajuk.cifsds.org/uploads/1/3/1/3/131380081/3655512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/28654899153.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/79909004198.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/bloody_eye_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/80756289858.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/english_grammar_modal_auxiliary_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/9764998817.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/8765042376.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/55211844315.pdf
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/illinois_drivers_license_written_test_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1635/4978/files/history_of_ashanti_kingdom.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/rexunasovujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/95384103338.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_off000086b6.bin
29bb0af8e1987360e6fb89a45bb3a44061f5940dbe3bfb69874ef926595afa19
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B6 4724 bytes
font_01_sfnt_off000096a8.bin
dcd258636b1fefe883de59a730a5859cf310dd47914b92702e13b1ad57d76bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A8 9980 bytes