Malicious PDF — malware analysis report

Static analysis result for SHA-256 684f9952774cf736…

MALICIOUS

PDF

60.8 KB Created: 2020-08-07 23:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb30c4a7d1ca2f9f2df6e5f136858fdb SHA-1: bd9232af1883848e81389e7936be0282e6076e6b SHA-256: 684f9952774cf736f2950414aa806f83071fd3f812a6ed475a46c97d459e7bb8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'learning Arabic', which is then followed by the malicious URL. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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/pify?keyword=belajar+percakapan+bahasa+arab+sehari+hari+pdf
    • http://lomekawu.pamelacalore.com/uploads/1/3/0/7/130738870/sikinuferoredoj.pdf
    • http://files.kelseyglynn.com/uploads/1/3/0/8/130874180/fbe8d13eddc1c8.pdf
    • http://files.spaalamode.com/uploads/1/3/1/4/131410370/6344bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/90108618276.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/tenasorosegonojerivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6967/files/88335104299.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/nipowirolusogapekirim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/zigevowexigitalobefan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9878/files/tifurixejovumodiseramuged.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/carbonyl_protecting_groups.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1356/files/brother_utilities_scan_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/tipos_de_cadenas_alimentarias.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_off000064c0.bin
1877595202c6ff0a9b7d209613599a8eba351a44d4ef472bf31cbdd3ac0a3ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 5572 bytes
font_01_sfnt_off000077a7.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 3720 bytes
font_02_sfnt_off00008302.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 1936 bytes
font_03_sfnt_off00008c49.bin
e6f18127ffae68b16d1e5bf9a20170c58a51f8e12241761a6271a62d2a51b1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C49 12616 bytes
font_04_sfnt_off0000b3ed.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 16164 bytes
font_05_sfnt_off0000c93e.bin
aa8e11b0aa14ce890073b9ce813dcc2526d276c6391f2d56068fc7e2acdda1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 8268 bytes

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