Malicious PDF — malware analysis report

Static analysis result for SHA-256 726cec1c87c447d9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 23:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 099c760597a45fd6c8acf29ee938c21b SHA-1: 33b64ef07c8c639b297701bdcb035c654e447c0b SHA-256: 726cec1c87c447d9fd9a3e21e92031f3b4b91c1ccd9b1d12da28093033144f45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a software mod, likely intended to entice clicks. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to potentially harmful sites.

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=hungry+shark+world+all+sharks+mod+apk
    • http://jagexamid.wer4jesus.com/uploads/1/3/2/6/132681670/nemopasil-vitesafuvoxen-fikidikefowezi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1247/files/jurnal_titrasi_argentometri_metode_mohr.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/jivukixaperosavubenilere.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/mixovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4487/files/22035469070.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/morphvox_pro_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/40259296582.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/phylum_porifera_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/online_convert_jpg_to_less_than_1mb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/css_media_queries_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0429/5137/7049/files/nimofap.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_off00006aea.bin
4054f893a06c9dae35d278e7179b1dd85cda96a6a04057b397ff71bf2872dcea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEA 5592 bytes
font_01_sfnt_off00007dd1.bin
0df4fce7e210902cb4a7d181a15468573d75d210bff51f97b4491a69214e55dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD1 10520 bytes