Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5f94ef9acff32d…

MALICIOUS

PDF

46.4 KB Created: 2020-08-28 11:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5e6a0df25006712f1224beb9ceaa83 SHA-1: d0ccb01434607d478495ee23b170126e1185f144 SHA-256: 3d5f94ef9acff32ddd07a21800fac42c61b70e350306f9f0f505f328f18bb2c6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links hosted on 'cdn.shopify.com' and other domains. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the same malicious URL. The primary attack pattern involves luring users through these links, potentially for SEO poisoning or to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=elementos+del+delito+de+estupro
    • http://fexajal.newfoundlandponies.org/uploads/1/3/0/7/130739591/xofufoxatakofivoxaz.pdf
    • http://files.integratedhealthcare.ca/uploads/1/3/0/7/130740551/laremomowiwivu.pdf
    • http://files.littlegabba.com/uploads/1/3/0/7/130739864/latazegogos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/jiriwefigaporijofemuderu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/alagappan_clinical_medicine_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/13261999853.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/biochemistry_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/vabomosasugabodegog.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/basic_electronics_components_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/tularoxakiketa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/segment_routing_part_ii_traffic_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/asus_zenfone_5q_android_p_update.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/2547663463.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/nerukupomesisorufosiwujok.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_off000076d2.bin
9d529726a15c342cfb2a8f7d995c1a4a43fbe1050f56fa00393a92759200a34d
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D2 4852 bytes
font_01_sfnt_off0000873e.bin
83c1dc0c223956533ba8462b0309b0471479720c6f3484f0327b517d857ae14e
pdf-font-stream PDF embedded font (sfnt) at offset 0x873E 10988 bytes