Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e89067edb68778c…

MALICIOUS

PDF

62.8 KB Created: 2020-08-23 05:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db2f87af5187a428c74117d30af0cfce SHA-1: d715cd633d25286626a24ca8ce93643e9fa70d17 SHA-256: 4e89067edb68778c42e3f0e52b05fc10b3e8613a1aeab7b0960ddeaaedc9b714
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF file was flagged by multiple critical heuristics indicating it is a malicious redirector and a link farm. The document body contains a URL that leads to a redirector service, which is a common technique for obscuring malicious destinations. The presence of numerous embedded links, many pointing to the same redirector, reinforces this assessment. No scripts were extracted from this sample.

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=aavaram+poo+movie+hd+video+songs
    • http://metemar.graywaycreations.com/uploads/1/3/2/8/132815028/topurokosolokozale.pdf
    • http://files.elainaburns.com/uploads/1/3/1/3/131380558/ab5caf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/company_performance_analysis_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/equipped_for_reading_success_david_kilpatrick.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/16148428719.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/77405594445.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/amputee_definition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/mini_dirt_bikes_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/luvatopusofogodomujop.pdf
    • https://cdn.shopify.com/s/files/1/0436/7735/2089/files/daviguzurebepezubuziwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/38878232437.pdf
    • https://cdn.shopify.com/s/files/1/0434/4522/3591/files/livro_axiomas_de_zurique_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8333/files/guxokano.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c9.bin
eec76b9d0876acf5d91c260a43fa54e20bac2dd9357916e730aee4295065e896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5388 bytes
font_01_sfnt_off000073fa.bin
509bbe7c4ff376795c3eb085149ef779a308b97aaf2ac1d06959b0677f2842a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FA 16228 bytes
font_02_sfnt_off000097fa.bin
985570ae76c3cdc2ff2e76ed5f77b29ccbf1335086c7577d6082f85f6637e799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FA 5028 bytes
font_03_sfnt_off0000a969.bin
1bda4b38df48efb6c30685284649399a954c33d80859f2a540ff7e6e14fd8131		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 13800 bytes
font_04_sfnt_off0000d4aa.bin
213a6ab797dc35435dc408fc8c1cfa058450217142279b1e22f23a6708e491d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 16368 bytes

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