Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e782add7e0d2842…

MALICIOUS

PDF

33.0 KB Created: 2020-08-31 10:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab11a6d349dfb5f82693a30378ec0b4 SHA-1: 2a62b8323d72e6bed4f9e5a1caba8a2253c74941 SHA-256: 5e782add7e0d2842613bd72845ccac071980d185b6a85383f8deff11272e4875
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body and embedded links suggest a lure for free movie downloads, a common social engineering tactic. The presence of numerous Shopify links, while some are benign, indicates a link farm used to obscure the malicious destination.

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.ru/wix?keyword=ninja+turtles+movie+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/5186/4484/files/13452205220.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/1630771114.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/54549807556.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/83163474341.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/javascript_remove_item_from_array.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/best_reader_for_windows_10_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/xakufev.pdf
    • https://cdn.shopify.com/s/files/1/0450/6628/9302/files/88424566505.pdf
    • https://cdn.shopify.com/s/files/1/0429/2683/3823/files/root_cause_analysis_in_healthcare_tools_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/fexarasozesigajogilugazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/cuaderno_de_trabajo_5_grado.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/16837531378.pdf
    • https://static.usrfiles.com/ugd/b8c837_52f3afe6cc2a4343b50c8456402e07f7.pdf
    • https://static.usrfiles.com/ugd/9757e7_1b71a8e9e47d4a82b600609180fb1083.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_off0000447a.bin
148d5297d8c56daa9a1ada197d8502110d9beee90fef4befa9232623a4b3dde0
pdf-font-stream PDF embedded font (sfnt) at offset 0x447A 5252 bytes
font_01_sfnt_off00005653.bin
7a42e7201bd6cd49f3b7ff18d5b0c99356da85fa08188d3df0340d940d42d0fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 9548 bytes