Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad434de3faae4a3…

MALICIOUS

PDF

39.4 KB Created: 2020-09-10 05:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d04af2bebb7524817d14ccbf9e012fb SHA-1: 71c3770333297e71d23b6bdfe55f63e21aea33c7 SHA-256: 5ad434de3faae4a3a986dbe0c9074491fe3e2d2ecdcce9f4d0e3524bc7e0f534
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.me/wix?keyword=belajar+membaca+anak+tk+apk'. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=belajar+membaca+anak+tk+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/github_system_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/johnson_outboard_25_hp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6608/files/kukiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/6563917505.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7495/files/49059465422.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/36924771543.pdf
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/google_cloud_print_api.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/22383227969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/driver_asus_a455l_series.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/gususabumoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/3172527076.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/xrt_pro_diesel_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/jarrod_radnich_star_wars_sheet_music.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e43.bin
134e912d241353323f2b0ac8ee7a00246df70ce3b24f4376c0f929fcb799f232
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E43 5228 bytes
font_01_sfnt_off00006ffc.bin
678b57e609c7aaf1427867c408bc45c157ee4bd7a3d49e957108e89c4b825dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 9480 bytes