Malicious PDF — malware analysis report

Static analysis result for SHA-256 76da2b02683d3e78…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 08:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 962f2cea568772e8f1acaa10d5be29e2 SHA-1: 05b613015fa6fee71625c6899ad4fd6e92ad45fc SHA-256: 76da2b02683d3e780071c274179868aa41115af761f32175c43ef6f3f8ef1541
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and text related to 'aaa games ported to android', suggesting a lure. The presence of numerous external links and a malicious redirector indicates an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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=aaa+games+ported+to+android
    • http://files.traventuring.co.uk/uploads/1/3/1/3/131379054/rixuxukag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/sunef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/77402426215.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/gekuwesupudetoxuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/mixefodizinakibu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/women_s_saucony_guide_iso.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/66106721550.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/63139950431.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/wupalubakoniwukuwe.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_off00007c70.bin
61ba9f3fc34621b6ac7ee86e1d35606d0be07f610ef734838bc0d0476c03eff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C70 5236 bytes
font_01_sfnt_off00008e24.bin
16013a77f4de6b535e3a0951875b9c628533269286e68d5757431400ab7b4387
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 10328 bytes