Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aa28ef14e845de…

MALICIOUS

PDF

43.8 KB Created: 2020-08-17 04:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9185c4021d80f03b71f6a0eb8200bbde SHA-1: 772b1526fb6fda37f7e0992bd1e864d17e9d44c2 SHA-256: 08aa28ef14e845dee71c39e91bfe1769815cef7cd01fe30449c5ef95e1137388
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as hospital reports. It also exhibits characteristics of a link farm, embedding numerous links to other PDFs, likely to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an intent to redirect users to malicious infrastructure.

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.com/pify?keyword=blk+super+speciality+hospital+reports
    • http://files.lifecoachonline.ca/uploads/1/3/2/6/132682655/bupibolubexegaped.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/gta4_xbox_360_mods.pdf
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/basic_english_sentence_structure_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/2322076943.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/rafeso.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/sales_action_plan_sample_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/44373529373.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/accumulation_of_capital_rosa_luxemburg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/99599276768.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8018/files/32906900257.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/37916330100.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/33827863952.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/vewar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/suxoke.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/business_plan_restaurant_template.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_off00006273.bin
180cbdb4cb3b13895c42db6c7071d1f1fcd6a73da338283f55098a4e186113cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 5236 bytes
font_01_sfnt_off0000743f.bin
2ca79a443f4886616eb30ce409e3447f70e8167bf79c0839889f68b8a479e0d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 14804 bytes