Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c65a751c7f8c015…

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 12:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1bce7c851ee169bf29d20d083509c7 SHA-1: e135dc91b247dd097e916f195e01d9ea24415160 SHA-256: 5c65a751c7f8c015ca2c9cf61a709f671a45918f177b97fc1ab1d1ea0942d134
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to games and academic downloads, suggesting a lure. The presence of numerous links, including to Shopify, indicates an attempt to manipulate search engine results or present a deceptive list of resources to the user, ultimately directing them 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/wix?keyword=balloon+shooting+games+free++for+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9246/6080/files/sociology_by_shankar_rao_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/jepile.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/a4_acetate_sheets_uk.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/ninuvixuvonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/hp_p1102w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/aleister_crowley_o_livro_da_lei_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/fegigew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/acca_f2_past_exam_papers_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7348/4438/files/xuxewizabapuwepekiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/53531376957.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/29205282281.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/22072453380.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/67285759874.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_off000068fb.bin
37a5033e2536cf24642c3f62e0f45ab72cfbf7f69f70b6bc00ddc004776c651c
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 5480 bytes
font_01_sfnt_off00007b76.bin
ad59fa0deeafed8e7b8bb350072a1829d435c333cc4859e62912aed844666a2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 10420 bytes