Malicious PDF — malware analysis report

Static analysis result for SHA-256 310d6b2b83ee91a4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 03:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed1d100da72fac54bd99981018d51cf SHA-1: 0ee580c58b8039b5fcc240cb22c2950532135cd4 SHA-256: 310d6b2b83ee91a4c47f070318018717b5c11960f848dfcd58216c0c83ab23fa
120 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a common technique for SEO poisoning and redirecting users to malicious sites. One prominent link, 'https://ttraff.ru/pify?keyword=aptoide+for+windows+xp', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for software downloads. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to create a link farm for SEO manipulation, ultimately leading to the malicious redirector.

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.ru/pify?keyword=aptoide+for+windows+xp
    • http://files.elizabethgreenbrighton.co.uk/uploads/1/3/1/3/131379594/bekovofikavazit-fotarazavexodo.pdf
    • http://giwekeg.senojwatches.com/uploads/1/3/0/8/130814328/kikokomedinoguvuba.pdf
    • http://files.obclansing.org/uploads/1/3/0/7/130738876/zogikudiwiju.pdf
    • http://dojovovu.aspinehealth.org/uploads/1/3/2/6/132682533/vonak.pdf
    • http://veromobox.toughguardsingapore.com/uploads/1/3/0/7/130739783/dafigatuxezitom-minag-padosutivilisi-tukugaranolosas.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/nusamowopiboregopubal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/wituxularepogapiribelewed.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/sukadowekewaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/44852681515.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/avancemos_1_workbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/94898788797.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/84571133187.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/86004374193.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/71841610793.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/90763617804.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7184/files/78382544394.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/worugudufufug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/warhammer_40k_tau_codex.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_off00006e4c.bin
743bc20b67a0a21a6fdd89f37fd0c89b6f96367d0a323c3f38bff4d0bfd31865
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 4940 bytes
font_01_sfnt_off00007f3e.bin
10e68073ef46544d919925b6d20ccdd05d6d16c5d8aa0922a4e8e38eb6daf8ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3E 10036 bytes