Malicious PDF — malware analysis report

Static analysis result for SHA-256 751b2149a504f450…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 23:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2696ebfc456ffb52f444a95c9baf1080 SHA-1: e928a59e52cea8567369ad9d711331d750ed9e2d SHA-256: 751b2149a504f45013c72b62cc2b1df076e71111e17baf77aa75d0503a125424
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other URLs hosted on Shopify, suggesting a link farm or redirection scheme designed to lead users to harmful content.

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=mankitsu+happening+ep+3
    • http://files.mazeaudio.com/uploads/1/3/1/4/131407424/xokitofawazas.pdf
    • http://files.jakebuyshouses.us/uploads/1/3/0/7/130775897/6527367.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/wutixudotira.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/shaffer_annular_bop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/sipiroxova.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/45197545908.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6945/files/17988287555.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/98286008444.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/85482883606.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/50266927749.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/ikea_malm_bed_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/8944/4510/files/66628318650.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/15426213169.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c47.bin
d7ebb4b010e04949c43a729884e932add2967fb6a5fcd73bac7afaca5a6fffb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C47 4284 bytes
font_01_sfnt_off00005b75.bin
0606e80e044f78408c0be8430bca2e0120391d5c62ef88c262e7812f67fbf5b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 5184 bytes
font_02_sfnt_off00006d1e.bin
6bd22054a7edc19ffbc8e10fd2498d57a17c49440fcc4ae8a1d92cbe43d50752
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 9968 bytes