Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1130bb8ff99ebc…

MALICIOUS

PDF

42.6 KB Created: 2020-09-02 01:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 166135f2b79337c72dd9f84d9e05c450 SHA-1: 96f7c5b38444e2da785aa562727ce0bc828ddd18 SHA-256: ce1130bb8ff99ebcc12b34823b525ce31f79ce5a212c06d095501d603de7928f
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=buddypress+registration+form+validation'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of other embedded links, many pointing to Shopify, indicates a potential SEO poisoning or link farm tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=buddypress+registration+form+validation
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/98611192831.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/miopia_astigmatismo_hipermetropia_presbicia.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/flower_coloring_sheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/strengths_and_weaknesses_of_logical_framework_approach.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/gegapesu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/galiwupasefulesanufivam.pdf
    • https://cdn.shopify.com/s/files/1/0466/6553/1557/files/straight_line_graphs_worksheet_tes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/fomeridexebujode.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/1123446949.pdf
    • https://cdn.shopify.com/s/files/1/0435/1485/5583/files/thoracic_back_pain_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/lfs_tweak_ayar.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/tejojemufibilugavumesip.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4778/files/low_profile_platform_bed_frame_full.pdf
    • https://cdn.shopify.com/s/files/1/0456/8360/5663/files/cheniere_energy_partners_lp_annual_report.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_off00005e9b.bin
47c81849f345413784de1473ea6b681b59d07034462fa0cb45f4bbc524a8ba24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 5572 bytes
font_01_sfnt_off0000718d.bin
f51c31b6f969b87a95114b8d6d7ff948903ed19f7f6428d28b22e93b3022fcd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 13592 bytes

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