Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a67c3bf93fee168…

MALICIOUS

PDF

66.6 KB Created: 2020-08-09 18:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea051169ef6d016b05ceaab844218eb SHA-1: 3f2fbf136975e114125649aed985275cbb35fd06 SHA-256: 5a67c3bf93fee1683dda611e59cbc2130d2a1b8dc220ef3d1609578102cd1efc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but ultimately lead to a known malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mapa+turistico+carretera+austral+pdf, which is used to obscure the final destination. The ML classifier strongly indicated maliciousness, supporting the heuristic findings of a malicious redirector and a link farm.

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.cc/pify?keyword=mapa+turistico+carretera+austral+pdf
    • http://files.brickstoremuseumshop.org/uploads/1/3/0/7/130775633/kugafavivu.pdf
    • http://files.aa-waterloo.org/uploads/1/3/2/3/132303189/burixupel.pdf
    • http://files.mshdesigns.com/uploads/1/3/0/8/130814411/2f2956e5ad.pdf
    • http://files.highintensitytrack.com/uploads/1/3/0/9/130969433/27201a4.pdf
    • http://sojok.alterationstotnes.com/uploads/1/3/0/7/130775934/rotofijudanabopu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/how_to_call_methods_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/desovatevuxuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/double_bunk_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/21171207323.pdf
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/poxobos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/talasaruxufabezugerubejug.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/gosojup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/telitifesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/assembler_plusieurs_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/awesome_god_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/documents_presentation_memorandum_of_association_articles_of_association_project.pdf
    • https://cdn.shopify.com/s/files/1/0438/0380/3808/files/physics_practical_experiments_for_class_12.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008767.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8767 6440 bytes
font_01_sfnt_off0000975b.bin
fa1093f186878ce6c43e26bff45f64e068d6e8ad6ca296f287f5cdd6a1069a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975B 5156 bytes
font_02_sfnt_off0000a8f8.bin
fe315c2cf4f09dc073628df833e51ea69ef402c58192bb7831bddc8f5c308eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F8 5164 bytes
font_03_sfnt_off0000bbe9.bin
52d4ff943fcee6a6d8ca86dfd0476ac808e38d68840d82ca038a943ff3f5d57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE9 11560 bytes
font_04_sfnt_off0000e1bd.bin
66fe4cde64174aa7ead4560e72967ca8681fdde4bf9fe8d8aa18ec22ba106555		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 17144 bytes

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