Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccce8b541bd1fa6f…

MALICIOUS

PDF

40.9 KB Created: 2020-08-26 22:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee67308c744f510316c84ec31a9de547 SHA-1: 32c9925daa8a5429af1a47c1a67880b72461ae2f SHA-256: ccce8b541bd1fa6f193f5bb316c158e9cff663542e6b60ce002e3101e5f51d04
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=mukavemet+1+kitab%2525C4%2525B1+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting 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=mukavemet+1+kitab%2525C4%2525B1+pdf
    • http://rizuru.pestcontrolsolutionsla.com/uploads/1/3/1/4/131412181/febumebamisirazoparo.pdf
    • http://files.kaylabegay.com/uploads/1/3/1/3/131380177/3e8641945e0fc84.pdf
    • http://xifisero.cafeyugo.com/uploads/1/3/1/3/131383791/8547802.pdf
    • https://cdn.shopify.com/s/files/1/0433/9335/1843/files/xetezisigizibojadowifeme.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/common_size_income_statement.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/classroom_of_the_elite_light_novel_volume_8.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/67474761884.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/xaxagerupu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/factors_affecting_durability_of_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/jekegisebop.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_off000060be.bin
ee9d77fa5bfd81184cd7c50679c909d3820f019f828c7573fadb5145e0a1a3fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 5236 bytes
font_01_sfnt_off0000729b.bin
614291a7682b89867461cfaec790374f332100a63859f2592efd0fa84115135d
pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 10176 bytes