Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb363f6b8ca0ef1a…

MALICIOUS

PDF

74.0 KB Created: 2020-08-15 04:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ceeb445ba3368b90e7d8a8684ea118 SHA-1: 69dceac9586660425feae315a5575d9a660d80fe SHA-256: bb363f6b8ca0ef1a8cb56fff02a5064b19d8fb1099b9c7d3aad01d6f242a7fda
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm pointing to numerous external PDFs, many hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/pify?keyword=gauge+transformation+equation. The document body is heavily obfuscated and contains no readable content to further inform the attack pattern. No scripts were extracted from this sample.

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.cc/pify?keyword=gauge+transformation+equation
    • http://bupikoke.staidans.ie/uploads/1/3/1/3/131381167/xetaxomixitis_loregid.pdf
    • http://taguma.rachelbrodie.net/uploads/1/3/1/6/131637136/xikonodizi.pdf
    • http://files.smhumzaali.greatwebsitebuilder.com/uploads/1/3/1/6/131606262/7175b3f49b.pdf
    • http://baxizeke.stevenstackplaywright.com/uploads/1/3/1/4/131482976/d235b035a1cb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/xapinozipelade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/biblia_dios_habla_hoy_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/18695231981.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/boretuminabizunaxuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/iterm_split_pane.pdf
    • https://cdn.shopify.com/s/files/1/0437/7316/5725/files/wesavojad.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/gusul.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_off0000d91a.bin
30c10fa240af386083cb05f0cce5d9b06a2fa3ce60942763f7243f9a79deec5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 5212 bytes
font_01_sfnt_off0000eac9.bin
c84b5277f81da4a0a5241fae1af30c4dd2bb3f5985ffe1ea6e005acce6bc04c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 15624 bytes