Malicious PDF — malware analysis report

Static analysis result for SHA-256 599366300706fe49…

MALICIOUS

PDF

48.3 KB Created: 2020-08-06 07:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d81bfdbcde10abf17585f3fbeb08e7 SHA-1: ebf654b731524a374b02ff2437fdba16b1aab364 SHA-256: 599366300706fe491ef71e71c551b9591f6419214b1bd6647f0528360e261eac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=weight+gaining+diet+plan+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains text related to a 'weight gaining diet plan pdf', suggesting a lure to entice clicks on the malicious link.

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=weight+gaining+diet+plan+pdf
    • http://files.12stonesmoldcleaning.com/uploads/1/3/1/4/131406563/4908156.pdf
    • http://files.airdriekarate.net/uploads/1/3/1/3/131379991/2462983.pdf
    • http://files.thesparklingfox.com/uploads/1/3/1/4/131406592/teguwozo_wawitexowiba.pdf
    • http://files.xplicator.info/uploads/1/3/1/8/131871704/292b6b1e6fb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/29111131735.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8946/files/insert_header_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/physical_chemistry_raymond_chang.pdf
    • https://cdn.shopify.com/s/files/1/0439/1524/7771/files/divi_api_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/jokapokibeloxowemixowis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/40164235696.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/gitekuremi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/27176598804.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72645751706.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5018/files/depivasusomog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/natobafosajawibofivefogul.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_off000071f1.bin
54d14d1412355e5e2956798bd3b92d15da262fd8aa0fdaf9dcfb921ddc0dc3a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 4720 bytes
font_01_sfnt_off00008202.bin
d63a53f7d03c7adaec895d280ad43a6f5a5424bf8ab7051d068df93f0a98e3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8202 10596 bytes
font_02_sfnt_off0000a641.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA641 4324 bytes

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