Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e74c5264ed7027d…

MALICIOUS

PDF

45.7 KB Created: 2020-08-16 10:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57034b200244ac2ece1ba2c7e3ef5a11 SHA-1: 61d8509d055ab63169d836fef516793ede0465ab SHA-256: 5e74c5264ed7027d4f3a2ce4f67e6e1d0ebc08282bab9cd0cc700d8b5966e4d8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=general+knowledge+quiz+2019+with+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain similar URLs and text related to quizzes, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially distribute malicious content or improve SEO for malicious sites.

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=general+knowledge+quiz+2019+with+answers
    • http://files.learningcafe.us/uploads/1/3/0/9/130969469/be49303.pdf
    • http://zenepafab.healthylivingtc.com/uploads/1/3/2/6/132681409/05ec101c3d1f8d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/calistenia_y_street_workout.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/xaxonovagaguvugep.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/magic_mods_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/arabic_to_urdu_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/3358/6838/files/balagtasan_tungkol_sa_pag_ibig_o_pag_aaral.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/64272918725.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8320/files/how_to_develop_self_confidence_carnegie.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/zuzitukezonidiramizub.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/84854236603.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/97507967241.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0439/2560/2472/files/45642303997.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/kubixirisofin.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b84.bin
53620d13270a9e5765e12a824f26f095a663902a2fba08c82132674a6495db3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 5932 bytes
font_01_sfnt_off00007fc8.bin
0e3e86827a855ae6c8c29e34b0aad1f6ee0f3e2673ca8b17a265e95f3db95989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 13068 bytes

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