Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b46c4fc5739356…

MALICIOUS

PDF

47.5 KB Created: 2020-08-19 12:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f436d97e440870521ef293cd6c071e55 SHA-1: e66a1cce402a190c3764432389f2ea366fdfe383 SHA-256: c0b46c4fc57393562b13ba734b756b21d275509e71271003659ca07a37346268
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=ayurvedic+herbs+list+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

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/pify?keyword=ayurvedic+herbs+list+pdf
    • http://botib.dammerungarts.com/uploads/1/3/1/3/131398564/c6a862878a5498.pdf
    • http://files.goodgirlsgonegrimm.com/uploads/1/3/1/6/131606694/e9ad0e513.pdf
    • http://files.neuro-flowgroup.com/uploads/1/3/1/3/131383323/8641228.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/63902244688.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/island_royale_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6088/files/llc_operating_agreement_template_california.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/85432970146.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/all_formula_of_maths_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/21487599031.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/best_camera_scanner_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/80018020485.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/mercedes_glb_2020_preisliste.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/app_store_mac_slow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/malevolent_netflix_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/zoxutapevuzuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c13.bin
ed35c4633d7433dc3e8cf331977e2a7d46c8964e14fa097908fbe0d2e860a26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 4992 bytes
font_01_sfnt_off00007d23.bin
ec36e305a9005c3fdd69c69c928de419c053e4be83579e57313b469ab61b6ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D23 11692 bytes
font_02_sfnt_off0000a312.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA312 4324 bytes

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