Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c7c87377a0b923…

MALICIOUS

PDF

54.6 KB Created: 2020-08-17 18:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: babf86f216e81fbacb10b75d6209b64b SHA-1: 5a6a4c6d9580e40bea7c0cdd205c8620776ff949 SHA-256: 60c7c87377a0b9239f83cbd16659e364074338d006ed1ccf1ca8b943d0f185c9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=your+song+ellie+goulding+sheet+music+free', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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=your+song+ellie+goulding+sheet+music+free
    • http://files.virtualvideogamestore.com/uploads/1/3/2/3/132302924/lodafubibinunuf.pdf
    • http://vukuduse.tourdestreescanada.com/uploads/1/3/1/3/131379410/4f2c6.pdf
    • http://wabum.3mbluemerlecorgis.com/uploads/1/3/1/4/131437987/59ad5f.pdf
    • http://files.aisledoweddingservices.com/uploads/1/3/1/4/131438809/supubituzusego_niler.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/anti_tetanus_serum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/breast_cancer_ribbon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/algorithme_exercices_corrigs.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/90372065124.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/pokemon_sapphire_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/maryland_ifile_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/parigepatowaxafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/44268038737.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/numejirosufuxarudaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/ninarowixolavoses.pdf
    • https://cdn.shopify.com/s/files/1/0432/5913/4112/files/download_morningstar_direct.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.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.htmlTibetan

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000734d.bin
529fb1030e06c70bf115a2a20dfec4ca685c24c0a7a29100b29e76dc0827c05b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 5740 bytes
font_01_sfnt_off00008555.bin
54d02224b71aef06671b76689eeb73d4f877882fd0ea7072ff3ac24b92f00526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 5184 bytes
font_02_sfnt_off000096d4.bin
aea1749ee035a8088c539db0e0ec7e902f05647c987b74b30b2b0c810e37b897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D4 8544 bytes
font_03_sfnt_off0000a762.bin
e6b4de1a011c86c6bf5cb8fc757505f0ae81d84e79e11733f4bba26f9324fb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA762 10168 bytes

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