Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d637c6ee68b92b…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 20:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32871b82dba7a990a73b8f7f02bc264d SHA-1: 862a63a3fdeea0b93f2b8c604dd968b9097325ee SHA-256: 36d637c6ee68b92b1b2fa81be6d95351e9519f610db6444f4ed38f518e3b6d05
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=encyclop%25C3%25A9die+des+plantes+vivaces+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify domains, some of which are confirmed benign but likely serve as a camouflage. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the 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.com/pify?keyword=encyclop%25C3%25A9die+des+plantes+vivaces+pdf
    • http://files.luzcgonzalez.com/uploads/1/3/1/6/131606890/tifepinirefenij_rexonalo_jajowoxore.pdf
    • http://negine.neupexcompany.com/uploads/1/3/1/6/131606027/xadaga-birevinilapi.pdf
    • http://viwizali.kellykadera.com/uploads/1/3/2/8/132814930/gixeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/24326661585.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/15089928045.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/business_vocabulary_in_use_advanced_second_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/73407325302.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/38247665541.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/fibiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/31057387096.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/pdf_to_word_converter_with_editing_facility_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/amoxicilina_clavulanato_250_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/xazaguvos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/60806235511.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/zigolivemokabe.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e45.bin
a8ea5a35b6836d50dbbcd0f61fd735ed833df6938a79981ab59472e2e052e48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E45 5104 bytes
font_01_sfnt_off00008f79.bin
b38c76de4a3b60af4635003f104ac0ae9f60459d4d5f839c05679595f2409a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F79 11588 bytes
font_02_sfnt_off0000b34a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB34A 4324 bytes

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