Malicious PDF — malware analysis report

Static analysis result for SHA-256 035795d94daf9497…

MALICIOUS

PDF

65.2 KB Created: 2020-08-19 05:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a61e2e2ca28cd6687f7f67dfe69b16 SHA-1: 68d619e29df76a29749f0b7201ba54148ce3ad86 SHA-256: 035795d94daf9497caa0cdd8b3de871dfc4a2802effe8716ef609424bca129af
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to redirect users. One of the primary links, 'https://ttraff.cc/pify?keyword=me+bola+chatting+karegi+kya+song', is identified as a malicious redirector. The document body, though partially obfuscated, contains this same URL, suggesting an attempt to lure users into clicking it. The presence of numerous PDF links and the ML classifier's high confidence score indicate malicious intent.

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=me+bola+chatting+karegi+kya+song
    • http://ludavo.twincityphotography.com/uploads/1/3/0/8/130814328/2783753e704d5.pdf
    • http://files.nlcssteam.com/uploads/1/3/2/6/132683063/922fa137a9.pdf
    • http://rasirigo.avienteconsulting.com/uploads/1/3/1/3/131383982/5141447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/jobs_vocabulary_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/74105444702.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/mozezatumazazurekut.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/press_brake_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/math_for_machine_learning_open_doors_to_data_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/mevoxokaruverepexugugalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/bible_niv_1984.pdf
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/nomenclatura_quimica_inorganica_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/3004092939.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/17838441292.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684d.bin
795ff47525af9f0922240cf808269b9ec83fbd46b3d64a969519b25983f02779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 5372 bytes
font_01_sfnt_off00007a90.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A90 3720 bytes
font_02_sfnt_off000085eb.bin
655a54246993cffd8629db3c672cad113183bc1447fc10b19769f9332f5aac6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 7640 bytes
font_03_sfnt_off00009bcc.bin
833fc3ade350d3da15c4c524778c4b8f8541a01fba1a03b9efed8d7d6f54acc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCC 10852 bytes
font_04_sfnt_off0000c0f7.bin
de9da7f354271998662ba8552962b228b208f17f78a60609f39ef5d7fb61f644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F7 17840 bytes
font_05_sfnt_off0000db05.bin
d9cf48d61b93346cca14ab7c22430c0e9a6e081da4b7dd6d8cd9c33450590faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 8564 bytes

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