Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dda8b4fe63fb87…

MALICIOUS

PDF

71.4 KB Created: 2020-09-11 07:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52a4663a18abd4b994d7cda09cbff2b SHA-1: 740cb8ee33e52f76f573ae8a4a18a5c0ca05b603 SHA-256: d5dda8b4fe63fb87fbc8b2edb3f93d59330962d4ae03acca31f0a531d1616615
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Czech republic visa application form uae' and the malicious URL, suggesting a phishing lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of distributing links to potentially harmful sites.

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.link/wix?keyword=czech+republic+visa+application+form+uae
    • http://gamuzako.judithmbishop.net/uploads/1/3/2/8/132814930/c7cf9bcb2d1fb.pdf
    • http://files.pattyschroeder.com/uploads/1/3/0/7/130738846/zununabadut.pdf
    • http://kavur.angelachowell.com/uploads/1/3/0/7/130739664/liwepanug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/dogobukebamomarinor.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/67523656080.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/bihar_teacher_tet_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/82077592469.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/android_studio_ubuntu_16._04_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/laxexalujavuninigaxunusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/3558797955.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/wavepad_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/famajotokifazeveziwegazes.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_off0000dc1e.bin
d6e4ddf21515e1c2c07c31ced564f8aead89c0f407430c4ae36a7b062ec05964
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 5408 bytes
font_01_sfnt_off0000ee66.bin
f90f9642c33c5499f61463b4395fe31d4b622e1f220922f89e206634556af3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 10020 bytes