Malicious PDF — malware analysis report

Static analysis result for SHA-256 536953b7fa634ad3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 07:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a99df5fd7f8591108d89cb8694a194 SHA-1: 277056f8fd9c8ae0ca9cf5b7b0c1a26e45d4fa5e SHA-256: 536953b7fa634ad364752c42ba04f5a8e1e71e3ec5b3ac7d189ebeea4b33481d
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'Cara backup data android' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous external links, including a malicious redirector, suggests an attempt to lead the user to a compromised or malicious site, 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.com/pify?keyword=cara+backup+data+android
    • http://files.nlemanagement.com/uploads/1/3/0/8/130814605/9866682.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6014/files/blest_be_the_lord.pdf
    • https://cdn.shopify.com/s/files/1/0449/2355/1899/files/tipos_de_antibiograma.pdf
    • https://cdn.shopify.com/s/files/1/0437/9013/9549/files/35977764335.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/9209615822.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/balanced_scorecard_strategy_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/vilapujutazigerax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/36529208313.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/11502670180.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/16941195754.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/functional_requirements_of_hospital_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/artikel_bahaya_merokok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a4.bin
845bf38ce87a2e596211af1241435bda3c1feb3765325d7a8376d3865eaefd03
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 4848 bytes
font_01_sfnt_off00007625.bin
b1bfa81f0af2ac800897700aa8f2a437e82e247d2936039753b93ae14f79cbf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 10196 bytes
font_02_sfnt_off00009929.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9929 4324 bytes