Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c3e71599297796…

MALICIOUS

PDF

52.5 KB Created: 2020-08-22 21:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c550e384e26f83120e88c9cd024e8a4d SHA-1: 70568d8ba7751a5de3d365d999020293703b30f7 SHA-256: 93c3e715992977960c1fbd41ba2ad59eac93785b95ac45a31036f80a62f88098
152 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior through a critical heuristic firing indicating a redirector link to a known malicious infrastructure. Additionally, it contains a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly supports the malicious verdict. No scripts were extracted from this sample.

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=sundari+penne+malayalam+song+free
    • http://popakanu.rickydemedeiros.com/uploads/1/3/1/6/131606552/xanonuxege_jobegijinava.pdf
    • http://files.africanliongroup.com/uploads/1/3/1/3/131379678/9399255.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/english_to_bengali_language_translator_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/vamul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/90541382556.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/82231302536.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/41794010668.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/85430138835.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/45516896122.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3741/files/lobizepixupixopixip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/zatovelojudatuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/ledufadimowofonamujopeze.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jexibiduvowalaruworaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/14384541251.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/
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/fil

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c5.bin
702c9ff2e53a5680788fa979d265e8637c0f2b53ed3fca09afbe4ace32c0749c
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5568 bytes
font_01_sfnt_off00007a97.bin
7f431fbed2c49222b2be600526aebc51f96821d961db24a0f1ec58df5c5af442
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 8328 bytes
font_02_sfnt_off000096ca.bin
f3779369d32aab11ac99bd6f1cdd6aac5c306151e5057c0a6ad547d3989a0162
pdf-font-stream PDF embedded font (sfnt) at offset 0x96CA 14680 bytes