Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46fe4c6029575fa…

MALICIOUS

PDF

38.4 KB Created: 2020-08-12 05:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1395c849fb6937e8c6d52e0fbfdf0eac SHA-1: 75a7e95304ab92f59c75af3c8cace7bdc29e8d99 SHA-256: e46fe4c6029575fae4e14ac99f10af37b5ec3edfbd624cadf8626b67612b22be
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=let%20it%20rain%20piano%20chords%20pdf', which is flagged as a malicious redirector. This suggests the document is part of an SEO poisoning or phishing campaign designed to lure users to 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.cc/wb?keyword=let%20it%20rain%20piano%20chords%20pdf
    • http://files.shopplumgifts.com/uploads/1/3/2/8/132814343/zamifagebevigaleg.pdf
    • http://xozex.benmarshallwriter.com/uploads/1/3/0/7/130775432/gunuzodi_zogonosudutox_ketivofo.pdf
    • http://files.redbirdvocalmusic.com/uploads/1/3/2/7/132712163/feninili_rigev_rapinoragode_nutumoges.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/ganewej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/kitetogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/itext_add_png_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/revenue_recognition_methods.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/cake_by_the_ocean_mp3_download_skull.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65621046881.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/zowixijezosif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/42451735283.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/english_to_french_dictionary_with_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0451/5794/1402/files/supusonenexodubuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/aldehydes_ketones_and_carboxylic_acids_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/vadisasuzolefawekapebi.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/catecismo_da_igreja_catlica_livro.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_off0000477a.bin
9dd9ed5e66b45a3fded9b9d8bd8d20489a4684ac0824bf5af7002edf98258d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x477A 4940 bytes
font_01_sfnt_off00005831.bin
a0f5bf04215a84a39f700085120fa2dbf64bdd4711525851d5ef0932e47e4f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5831 12184 bytes
font_02_sfnt_off00007e6c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 4324 bytes

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