Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c269e7e90bc44d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 13:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16f497c2e818d9ccb638c75be04d8d08 SHA-1: 63e8158c21b1d99f0c6e18cd6e20a2040a0e022e SHA-256: b9c269e7e90bc44d958013b461871215ac6bcddf14af2aad54d376efeea9afb6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'ancient egyptian gods and goddesses pdf' and the malicious URL. This suggests the document is designed to trick users into visiting malicious sites by appearing to offer relevant 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=ancient+egyptian+gods+and+goddesses+pdf
    • http://files.nebraskaena.org/uploads/1/3/0/7/130776081/sedumumeboja-zezutozig-duzojajedifa.pdf
    • http://dinavew.saturnsthoughts.com/uploads/1/3/2/7/132740405/bazosaniwodalezilozi.pdf
    • http://files.fiveminutechurch.net/uploads/1/3/0/8/130874658/rasobotanukuga.pdf
    • https://cdn.shopify.com/s/files/1/0449/7460/4456/files/37279456481.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1175/files/arifureta_novela_ligera_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/rafodojusuvubozi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/69592765008.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/44528647444.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/febotodozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/wukamakikawog.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/jr_monga_basic_corporate_accounting_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/liste_jeux_pandora_box_5s.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/66528026464.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/21042449702.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f61.bin
6c41c4770d163e9f0903f23e6bc415805aa06425354b9bc0daa3a1f76207a548
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 5288 bytes
font_01_sfnt_off00008175.bin
e90688b24848783bdd89cdd8bdb669c300aae0fcc02dce868cfa1af1611fce48
pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 9696 bytes